Abstract

A near-field antenna is provided, which includes: a first dipole antenna, formed along a first axis, having a first meandering shape and a second dipole antenna, formed along a second axis different from the first axis, having a second meandering shape. The antenna also includes (i) a power amplifier configured to feed electromagnetic signals to at least one of the first and second dipole antennas, (ii) an impedance-adjusting component configured to adjust an impedance of at least one of the first and second dipole antennas, and (iii) switch circuitry configured to switchably couple the first dipole antenna, the power amplifier, the second dipole antenna, and the impedance-adjusting component.

IPC Classes  ?

• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/23 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H04B 5/79 - Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for data transfer in combination with power transfer
• H04W 4/80 - Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication

Goods & Services

Downloadable mobile apps and computer software for management and control of electronic hardware, namely, transmitter and receiver used for wireless transmission of power to rechargeable batteries and electronic devices; sensors for use in the delivery of wireless power; wireless communications apparatus for use in coordinating power transmitting and receiving. Invention services, namely, technical consultation and assistance services in the fields of inventions, technologies, methods, processes, ideas, discoveries, intellectual property, patents, patent applications and trade secrets; product development consultation in the field of power transfer; design services, namely design of products and equipment for use in wireless power transfer; engineering services in the field of power transfer.

Goods & Services

downloadable mobile applications and downloadable computer software for management and control of electronic hardware, namely, transmitter and receiver used for wireless transmission of power to rechargeable batteries and electronic devices; electric sensors for use in the delivery of wireless power; wireless communications transmission apparatus for use in coordinating power transmitting and receiving development of technologies in the field of power transfer; invention services, namely, technical consultation and assistance services being research and development in the fields of new inventions, technologies, methods, processes, ideas, and discoveries in the field of power transfer and power harvesting; design services, namely design of products and equipment for use in wireless power transfer; engineering services in the field of power transfer Invention services, namely, technical consultation and technical assistance in the nature of providing information in the fields of intellectual property, patents, patent applications, and trade secrets

Abstract

Methods and devices for wireless power transmission are described. An example wireless-power-transmitting device includes a programmable-splitter component configured to be switchable between a linear polarization setting and a circular polarization setting. The example device also includes a plurality of polarization-switching components coupled to a plurality of outputs of the programmable-splitter component, and a plurality of amplifiers coupled to respective outputs of the plurality of polarization-switching components. The example device further includes a plurality of antennas coupled to respective outputs of the plurality of amplifiers.

IPC Classes  ?

• H02J 50/23 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas
• H02J 50/00 - Circuit arrangements or systems for wireless supply or distribution of electric power
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices

Abstract

A method of wireless power transmission is performed at a wireless-power-transmitting device having one or more antennas configured to transmit wireless-power signals, one or more processors, and a wireless data transceiver. The method comprises detecting that a wireless-power-receiving device is located in proximity to the wireless-power-transmitting device; establishing a data-traffic profile associated with the wireless-power-receiving device, the data-traffic profile including identifications of data signals to be exchanged over a predetermined frequency band between the wireless-power-receiving device and the wireless-power-transmitting device using the wireless data transceiver, determining windows of time during which to transmit wireless-power signals over the predetermined frequency band to the wireless-power-receiving device based on the data-traffic profile; and at the determined windows of time, transmitting, by the one or more antennas, wireless-power signals over the predetermined frequency band to the wireless-power-receiving device.

IPC Classes  ?

• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02J 50/10 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
• H02J 50/12 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
• H02J 50/15 - Circuit arrangements or systems for wireless supply or distribution of electric power using ultrasonic waves
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/30 - Circuit arrangements or systems for wireless supply or distribution of electric power using light, e.g. lasers
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 50/90 - Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
• H04B 5/77 - Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for interrogation
• H04B 5/79 - Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for data transfer in combination with power transfer

Goods & Services

Devices for sending and receiving wireless power, namely, computer hardware, wireless receivers; electrical components, namely, electrical connectors, electrical switches, electric resistors, capacitors, electronic integrated circuits, and antennas for transfer and reception of electrical power through radio waves, downloadable software and control systems comprised of wireless transmitters and wireless receivers for regulating the focus, pulsing and intensity of the radio waves for providing power to charge rechargeable energy storage systems and to power electrical and electronic devices and systems; downloadable mobile applications and downloadable computer software for management and control of electronic hardware, namely, transmitter and receiver used for wireless transmission of power to rechargeable batteries and electronic devices; electric sensors for use in the delivery of wireless power; wireless communications transmission apparatus for use in coordinating power transmitting and receiving Product development; technology consultation and research in the field of power transfer; development of technologies in the field of power transfer; invention services, namely, technical consultation and assistance services being research and development in the fields of new inventions, technologies, methods, processes, ideas, and discoveries in the field of power transfer and power harvesting; technological and engineering consulting in the field of power transfer; product development consultation in the field of power transfer; design services, namely design of products and equipment for use in wireless power transfer; engineering services in the field of power transfer Invention services, namely, technical consultation and technical assistance in the nature of providing information in the fields of intellectual property, patents, patent applications, and trade secrets

Goods & Services

Devices for sending and receiving wireless power, namely, computer hardware, wireless receivers; electrical components, namely, electrical connectors, electrical switches, electric resistors, capacitors, electronic integrated circuits, and antennas for transfer and reception of electrical power through radio waves, downloadable software and control systems comprised of wireless transmitters and wireless receivers for regulating the focus, pulsing and intensity of the radio waves for providing power to charge rechargeable energy storage systems and to power electrical and electronic devices and systems; downloadable mobile applications and downloadable computer software for management and control of electronic hardware, namely, transmitter and receiver used for wireless transmission of power to rechargeable batteries and electronic devices; electric sensors for use in the delivery of wireless power; wireless communications transmission apparatus for use in coordinating power transmitting and receiving Product development; technology consultation and research in the field of power transfer; development of technologies in the field of power transfer; invention services, namely, technical consultation and assistance services being research and development in the fields of new inventions, technologies, methods, processes, ideas, and discoveries in the field of power transfer and power harvesting; technological and engineering consulting in the field of power transfer; product development consultation in the field of power transfer; design services, namely design of products and equipment for use in wireless power transfer; engineering services in the field of power transfer Invention services, namely, technical consultation and technical assistance in the nature of providing information in the fields of intellectual property, patents, patent applications, and trade secrets

Abstract

A wireless-power harvester integrated in a small device, comprising a stamped metal harvesting antenna. The stamped metal antenna is formed into a meandering shape. A first end of the meandering shape is a free end positioned within free space of a housing of a small device, and a second end of the meandering shape is coupled to a PCB that includes electrical components for operating and powering the small device. The PCB is configured to operate as a ground plane for the stamped metal antenna. An intermediate portion, disposed between the first end and the second end of the meandering shape, is coupled to power-conversion circuitry that is separate from the PCB. The power-conversion circuitry is configured to convert the one or more RF power waves harvested by the stamped metal harvesting antenna into usable energy for charging a battery of the small device or for powering the small device.

IPC Classes  ?

• H02J 50/00 - Circuit arrangements or systems for wireless supply or distribution of electric power
• H01Q 9/04 - Resonant antennas
• H02J 50/27 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of receiving antennas, e.g. rectennas

Abstract

An example method is provided for detecting and classifying foreign objects, performed at a computer system having one or more processors and memory storing one or more programs configured for execution by the one or more processors. The method includes obtaining a plurality of electrical measurements while a wireless-power-transmitting antenna is transmitting different power beacons. The method also includes forming a feature vector according to the plurality of electrical measurements. The method further includes detecting a presence of one or more foreign objects prior to transmitting wireless power to one or more wireless power receivers by inputting the feature vector to trained one or more classifiers, wherein each classifier is a machine-learning model trained to detect foreign objects distinct from the one or more wireless power receivers.

IPC Classes  ?

• H04B 5/79 - Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for data transfer in combination with power transfer
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 50/60 - Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings

Abstract

A method includes selecting a power level from among available power levels at which to amplify a radio frequency (RF) signal using a power amplifier. The method includes providing the amplified RF signal to antennas. The antennas are caused to, upon receiving the amplified RF signal, radiate RF energy within a transmission field. The method includes determining predicted specific absorption rate (SAR) values of the transmission field and determining, based on the predicted SAR values, a keep out zone within the transmission field. The keep out zone is an area at which the predicted SAR values are greater than or equal to a predetermined SAR threshold of the transmission field. The method includes receiving, from sensors, an indication that an object is within the keep out zone. The method includes in response to receiving the indication, causing the antennas to cease radiating the RF energy.

IPC Classes  ?

• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/00 - Circuit arrangements or systems for wireless supply or distribution of electric power
• H02J 50/90 - Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment

Abstract

An example apparatus disclosed herein includes a controller; one or more receiving circuits coupled to the controller, each receiving circuit configured to receive incoming RF signals from a receiver, the receiver transmitting a communication signal that identifies a location of the receiver; a plurality of transmitting circuits coupled to the controller, each transmitting circuit configured to generate outgoing RF signals based upon the incoming RF signals; and a plurality of antenna elements, the plurality of antenna elements including at least some dedicated antenna elements. In some embodiments, the controller is configured to: (i) select a first configuration of at least some of the dedicated antenna elements to be coupled to the receiving circuits, and (ii) select, based on the location, a second configuration of at least some of the plurality of antenna elements to be coupled to the plurality of transmitting circuits to transmit the outgoing RF signals.

IPC Classes  ?

• H04B 5/00 - Near-field transmission systems, e.g. inductive or capacitive transmission systems
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H02J 50/90 - Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment

Abstract

An example near-field charging system includes a housing that includes a charging surface and at least one other surface, a radiating antenna, and a non-radiating element positioned above the radiating antenna within the housing such that the non-radiating element is closer to the charging surface than the radiating antenna. The radiating antenna produces a first electromagnetic-field distribution that is received by a receiver, the first electromagnetic-field provides usable power when the receiver is placed at any position on a first portion of the charging surface. The non-radiating element changes a distribution characteristic of the first electromagnetic-field distribution to produce a second electromagnetic-field distribution, the second electromagnetic-field distribution providing usable power to the receiver when the receiver is placed at any position across a second portion of the charging surface of the housing, and the second portion is at least 10% percent greater than the first portion.

IPC Classes  ?

• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02J 7/02 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices

Abstract

Embodiments disclosed herein may generate and transmit power waves that, as result of their physical waveform characteristics (e.g., frequency, amplitude, phase, gain, direction), converge at a predetermined location in a transmission field to generate a pocket of energy. Receivers associated with an electronic device being powered by the wireless charging system, may extract energy from these pockets of energy and then convert that energy into usable electric power for the electronic device associated with a receiver. The pockets of energy may manifest as a three-dimensional field (e.g., transmission field) where energy may be harvested by a receiver positioned within or nearby the pocket of energy.

IPC Classes  ?

• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• G06V 40/10 - Human or animal bodies, e.g. vehicle occupants or pedestriansBody parts, e.g. hands
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/60 - Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H02J 50/90 - Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
• H04B 5/00 - Near-field transmission systems, e.g. inductive or capacitive transmission systems
• H04N 7/18 - Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
• H04W 52/28 - TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non-transmission

Abstract

Disclosed is a wireless power transmitter for wirelessly delivering power to a receiver device, the wireless power transmitter including: a plurality of unit cells configured to radiate one or more radio frequency (RF) power transmission waves, each unit cell in the plurality of unit cells including: (i) a metal portion having an interior perimeter that surrounds an aperture defined by the metal portion; and (ii) an antenna that is aligned with the aperture in a first dimension, the antenna being configured to radiate one or more RF power transmission waves for wirelessly charging a receiver device. The one or more RF power transmission waves leak from the wireless power transmitter at least in part through the aperture when the receiver device is positioned within a threshold distance from the unit cell.

IPC Classes  ?

• H02J 7/04 - Regulation of the charging current or voltage
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02J 50/10 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
• H02J 50/23 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas
• H04B 1/3883 - Arrangements for mounting batteries or battery chargers
• H04W 8/00 - Network data management

Abstract

A wireless power transmitting system includes a power amplifier comprising a plurality of measurement points and a power amplifier controller integrated circuit (IC). In some embodiments, the power amplifier controller IC performs synchronization of the various components of the power amplifier, conducts impedance and temperature measurements at the measurements points, determines if a foreign object is within the transmission range of the wireless power transmitter, and decides if a shutdown of the power amplifier is needed. In some embodiments, the power amplifier controller IC determines through a transmitter controller IC, the presence of a foreign object within the transmission range and adjusts the power transmission to one or more receivers.

IPC Classes  ?

• H02J 50/60 - Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings
• G01K 7/22 - Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat using resistive elements the element being a non-linear resistance, e.g. thermistor
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves

Abstract

Systems and methods for wireless power transmission based on object identification are provided. A radio frequency wireless power transmitter is in communication with a video camera for capturing image data (e.g., a visual pattern) of at least a portion of a transmission field of the radio frequency wireless power transmitter. A processor of the radio frequency wireless power transmitter is configured to identify an object when the visual pattern matches a pre-stored visual pattern representing the object, and control transmission of one or more radio frequency power transmission waves to a receiving electronic device based on a location of the identified object, wherein the receiving electronic device uses the one or more radio frequency power transmission waves to power or to charge the receiving electronic device.

IPC Classes  ?

• G06V 20/52 - Surveillance or monitoring of activities, e.g. for recognising suspicious objects
• G06T 7/60 - Analysis of geometric attributes
• G06V 10/42 - Global feature extraction by analysis of the whole pattern, e.g. using frequency domain transformations or autocorrelation
• G06V 30/224 - Character recognition characterised by the type of writing of printed characters having additional code marks or containing code marks
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/60 - Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H02J 50/90 - Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
• H04B 5/79 - Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for data transfer in combination with power transfer
• H04N 5/04 - Synchronising
• H04N 7/18 - Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast

Abstract

An example method is performed at a near-field charging pad with a processor, a power-transferring element, a signature-signal-receiving circuit, and the processor of the near-field charging pad is in communication with a data source that includes predefined signature signals that each identify one of (i) a wireless power receiver, (ii) an object other than a wireless power receiver, and (iii) a combination of a wireless power receiver and an object other than a wireless power receiver. The method includes: after sending a plurality of test radio frequency (RF) power transmission signals, detecting, using the signature-signal-receiving circuit, respective amounts of reflected power; generating, based on variations in the respective amounts of reflected power, a signature signal; and determining whether (i) an authorized wireless power receiver is present on the near-field charging pad and/or (ii) an object other than a wireless power receiver is present on the near-field charging pad.

IPC Classes  ?

• H02J 50/60 - Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings
• H02J 50/05 - Circuit arrangements or systems for wireless supply or distribution of electric power using capacitive coupling
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H04B 5/70 - Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
• H04B 17/21 - MonitoringTesting of receivers for calibrationMonitoringTesting of receivers for correcting measurements
• H04B 17/24 - MonitoringTesting of receivers with feedback of measurements to the transmitter
• H04B 17/29 - Performance testing

Abstract

An exemplary embodiment includes a method of communication between a wireless power receiver to a wireless power transmitter. The method includes receiving, by an antenna of the wireless power receiver, radio frequency (RF) signals from the wireless power transmitter, wherein the wireless power receiver substantially matches an impedance of the wireless power transmitter. The method further includes, while receiving the RF signals from the wireless power transmitter: (a) determining whether a communication criterion is satisfied, and (b) in accordance with a determination that the communication criterion is satisfied, introducing an impedance mismatch between the wireless power receiver and the wireless power transmitter that causes a portion of the RF signals to be reflected by the antenna as a modulated signal, wherein the wireless power transmitter is configured to receive and interpret the modulated signal without using a separate communication radio.

IPC Classes  ?

• H02J 50/27 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of receiving antennas, e.g. rectennas
• H02J 50/23 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices

Abstract

Methods and devices for surveying for active and inactive power receivers within a wireless-power coverage area are described. A method includes causing performance of a survey looking for active power receivers within a wireless-power coverage area using communication radio(s). Information is received from an active power receiver and transmission of RF signals is caused to energize inactive power receivers using a power-transmission antenna. A first RF signal is transmitted using a first value for a transmission characteristic, and a second RF signal is transmitted using a second value for the transmission characteristic. Additional information is received from a first energized power receiver and further information from a second energized power receiver. Two or more frequency bands are identified for radio-frequency wireless-power transmissions by a wireless-power transmitting device within the wireless-power coverage area based on the information, the additional information, and the further information.

IPC Classes  ?

• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H02J 50/00 - Circuit arrangements or systems for wireless supply or distribution of electric power

Abstract

Methods and devices for surveying for active and inactive power receivers within a wireless-power coverage area are described. A method includes causing performance of a survey looking for active power receivers within a wireless-power coverage area using communication radio(s). Information is received from an active power receiver and transmission of RF signals is caused to energize inactive power receivers using a power-transmission antenna. A first RF signal is transmitted using a first value for a transmission characteristic, and a second RF signal is transmitted using a second value for the transmission characteristic. Additional information is received from a first energized power receiver and further information from a second energized power receiver. Two or more frequency bands are identified for radio-frequency wireless-power transmissions by a wireless-power transmitting device within the wireless-power coverage area based on the information, the additional information, and the further information.

IPC Classes  ?

• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 50/23 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas
• H04B 5/00 - Near-field transmission systems, e.g. inductive or capacitive transmission systems
• H04W 4/80 - Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication

Abstract

An example integrated circuit includes: (i) a processing subsystem configured to control operation of the integrated circuit, (ii) a waveform generator, operatively coupled to the processing subsystem, configured to generate radio frequency (RF) power transmission signals using an input current, (iii) a first digital interface that couples the integrated circuit with a plurality of power amplifiers that are external to the integrated circuit, and (iv) a second digital interface, distinct from the first digital interface, that couples the integrated circuit with a wireless communication component that is external to the integrated circuit. The processing subsystem is configured to: receive, via the second digital interface, an indication that a receiver is within transmission range of a transmitting device controlled by the circuit, and in response to receiving the indication: provide, via the first digital interface, the RF power transmission signals to at least one of the plurality of power amplifiers.

IPC Classes  ?

• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/23 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H04B 5/79 - Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for data transfer in combination with power transfer
• H04W 4/80 - Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication

Abstract

An example wireless-power receiver comprises one or more processors configured to perform operations, including receiving, via one or more antenna elements of an antenna array, a plurality of first electromagnetic (EM) signals. Each antenna element of the one or more antenna elements of the antenna array has a respective polarization. The one or more processors are further configured to perform operations including, in response to a change in an orientation of the wireless-power receiver, changing the respective polarization to a changed polarization for the one or more antenna elements of the antenna array, and receiving, via the one or more antenna elements of the antenna array, and while the one or more antenna elements have the changed polarization, a plurality of second EM signals.

IPC Classes  ?

• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices

Abstract

Embodiments disclosed herein may generate and transmit power waves that, as result of their physical waveform characteristics (e.g., frequency, amplitude, phase, gain, direction), converge at a predetermined location in a transmission field to generate a pocket of energy. Receivers associated with an electronic device being powered by the wireless charging system, may extract energy from these pockets of energy and then convert that energy into usable electric power for the electronic device associated with a receiver. The pockets of energy may manifest as a three-dimensional field (e.g., transmission field) where energy may be harvested by a receiver positioned within or nearby the pocket of energy.

IPC Classes  ?

• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H02J 50/90 - Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
• H02J 50/60 - Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings

Abstract

An example method performed by a wireless-power-transmitting device including an antenna array is provided. The method includes, based on a location of the wireless-power-receiving device, selecting a first value for a first transmission characteristic that is used for transmission of electromagnetic waves by a first antenna group, and a second value, distinct from the first value, for the first transmission characteristic that is used for transmission of electromagnetic waves by a second antenna group. The method also includes transmitting to the location of the wireless-power-receiving device, by the first antenna group, first electromagnetic waves with the first value for the first transmission characteristic, and transmitting to a focal point that is further from the wireless-power-transmitting device than the location of the wireless-power-receiving device, by the second antenna group, second electromagnetic waves with the second value for the first transmission characteristic.

IPC Classes  ?

• H01Q 1/38 - Structural form of radiating elements, e.g. cone, spiral, umbrella formed by a conductive layer on an insulating support
• H01Q 21/29 - Combinations of different interacting antenna units for giving a desired directional characteristic
• H01Q 25/00 - Antennas or antenna systems providing at least two radiating patterns
• H02J 50/00 - Circuit arrangements or systems for wireless supply or distribution of electric power
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H01Q 9/26 - Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength
• H02J 50/90 - Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment

Abstract

A wireless-power harvester integrated in a small device, comprising a stamped metal harvesting antenna. The stamped metal antenna is formed into a meandering shape. A first end of the meandering shape is a free end positioned within free space of a housing of a small device, and a second end of the meandering shape is coupled to a PCB that includes electrical components for operating and powering the small device. The PCB is configured to operate as a ground plane for the stamped metal antenna. An intermediate portion, disposed between the first end and the second end of the meandering shape, is coupled to power-conversion circuitry that is separate from the PCB. The power-conversion circuitry is configured to convert the one or more RF power waves harvested by the stamped metal harvesting antenna into usable energy for charging a battery of the small device or for powering the small device.

IPC Classes  ?

• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/00 - Circuit arrangements or systems for wireless supply or distribution of electric power
• G06K 19/07 - Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards with integrated circuit chips
• H01Q 1/22 - SupportsMounting means by structural association with other equipment or articles

Abstract

A wireless-power harvester integrated in a small device, comprising a stamped metal harvesting antenna. The stamped metal antenna is formed into a meandering shape. A first end of the meandering shape is a free end positioned within free space of a housing of a small device, and a second end of the meandering shape is coupled to a PCB that includes electrical components for operating and powering the small device. The PCB is configured to operate as a ground plane for the stamped metal antenna. An intermediate portion, disposed between the first end and the second end of the meandering shape, is coupled to power-conversion circuitry that is separate from the PCB. The power-conversion circuitry is configured to convert the one or more RF power waves harvested by the stamped metal harvesting antenna into usable energy for charging a battery of the small device or for powering the small device.

IPC Classes  ?

• H02J 50/00 - Circuit arrangements or systems for wireless supply or distribution of electric power
• H01Q 9/04 - Resonant antennas
• H02J 50/27 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of receiving antennas, e.g. rectennas

Abstract

An example system includes a wireless-power transmitter configured to emit a first set of one or more radio frequency (RB signals and a security camera coupled to a wireless-power receiver. The wireless-power receiver is configured to receive the first set of one or more RF signals. The security camera includes at least one component for converting energy from the first set of one or more RF signals into usable power to power the security camera. The usable power is a primary source of power for the security camera. The example system can also include a processor in communication with the wireless-power transmitter configured to, in accordance with a determination that the security camera has moved relative to the wireless-power transmitter, adjust the wireless-power transmitter to emit a second set of one or more RF signals from the wireless-power transmitter to continue providing usable power to the security camera.

IPC Classes  ?

• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• A61B 8/00 - Diagnosis using ultrasonic, sonic or infrasonic waves
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H05B 3/34 - Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs
• A61B 5/145 - Measuring characteristics of blood in vivo, e.g. gas concentration or pH-value
• B60L 55/00 - Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements

Abstract

An exemplary embodiment of secure wireless transmission of power using unidirectional communication signals from a wireless-power-receiving device. The method includes, receiving, from a wireless-power-transmitting device that includes a first communications radio, a first wireless-power-transmission signal at a wireless-power-receiving device that includes a second communications radio. In response to receiving the first wireless-power-transmission signal: broadcasting, via the second communications radio of the wireless-power-receiving device and without establishing a communications channel between the first and second communications radios, a data packet, the data packet including information identifying (i) at least one power requirement of a power source of the wireless-power-receiving device (ii) an amount of power received by the wireless-power-receiving device from the first wireless-power-transmission signal. After broadcasting the data packet, receiving, from the wireless-power-transmitting device, additional wireless-power-transmission signals at the wireless-power-receiving device, wherein the wireless-power-transmitting device transmits each of the additional wireless-power-transmission signals using a predetermined sequence of different transmission characteristics.

IPC Classes  ?

• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02J 50/23 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas
• H02J 50/27 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of receiving antennas, e.g. rectennas
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 50/60 - Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings

Abstract

An antenna for receiving wireless power from a transmitter is provided. The antenna includes multiple antenna elements, coupled to an electronic device, configured to receive radio-frequency (RF) power waves from the transmitter, each antenna element being adjacent to at least one other antenna element. Furthermore, the multiple antenna elements are arranged so that an efficiency of reception of the RF power waves by the antenna elements remains above a predetermined threshold efficiency when a human hand is in contact with the electronic device, the predetermined threshold efficiency being at least 50%. Lastly, at least one antenna element is coupled to conversion circuitry, which is configured to (i) convert energy from the received RF power waves into usable power and (ii) provide the usable power to the electronic device for powering or charging of the electronic device.

IPC Classes  ?

• H01Q 21/20 - Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along, or adjacent to, a curvilinear path
• H01Q 1/52 - Means for reducing coupling between antennas Means for reducing coupling between an antenna and another structure
• H01Q 7/00 - Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
• H01Q 21/24 - Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
• H01Q 25/00 - Antennas or antenna systems providing at least two radiating patterns
• H02J 50/27 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of receiving antennas, e.g. rectennas

Abstract

A near-field antenna is provided, which includes: a first dipole antenna, formed along a first axis, having a first meandering shape and a second dipole antenna, formed along a second axis different from the first axis, having a second meandering shape. The antenna also includes (i) a power amplifier configured to feed electromagnetic signals to at least one of the first and second dipole antennas, (ii) an impedance-adjusting component configured to adjust an impedance of at least one of the first and second dipole antennas, and (iii) switch circuitry configured to switchably couple the first dipole antenna, the power amplifier, the second dipole antenna, and the impedance-adjusting component.

IPC Classes  ?

• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H04W 4/80 - Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
• H02J 50/23 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas
• H04B 5/00 - Near-field transmission systems, e.g. inductive or capacitive transmission systems

Abstract

An example method is provided for detecting and classifying foreign objects, performed at a computer system having one or more processors and memory storing one or more programs configured for execution by the one or more processors. The method includes obtaining a plurality of electrical measurements while a wireless-power-transmitting antenna is transmitting different power beacons. The method also includes forming a feature vector according to the plurality of electrical measurements. The method further includes detecting a presence of one or more foreign objects prior to transmitting wireless power to one or more wireless power receivers by inputting the feature vector to trained one or more classifiers, wherein each classifier is a machine-learning model trained to detect foreign objects distinct from the one or more wireless power receivers.

IPC Classes  ?

• H02J 50/60 - Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H04B 5/00 - Near-field transmission systems, e.g. inductive or capacitive transmission systems

Abstract

An example method performed by a wireless-power-transmitting device that includes an antenna array is provided. The method includes radiating electromagnetic waves that form a maximum power level at a first distance away from the antenna array. Moreover, a power level of the radiated electromagnetic waves decreases, relative to the maximum power level, by at least a predefined amount at a predefined radial distance away from the maximum power level. In some embodiments, the method also includes detecting a location of a wireless-power-receiving device, whereby the location of the wireless-power-receiving device is further from the antenna array than a location of the maximum power level.

IPC Classes  ?

• H01Q 1/38 - Structural form of radiating elements, e.g. cone, spiral, umbrella formed by a conductive layer on an insulating support
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H01Q 21/29 - Combinations of different interacting antenna units for giving a desired directional characteristic
• H01Q 25/00 - Antennas or antenna systems providing at least two radiating patterns
• H02J 50/00 - Circuit arrangements or systems for wireless supply or distribution of electric power
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 50/90 - Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
• H01Q 9/26 - Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength

Abstract

A method of wireless power transmission is performed at a wireless-power-transmitting device having one or more antennas configured to transmit wireless-power signals, one or more processors, and a wireless data transceiver. The method comprises detecting that a wireless-power-receiving device is located in proximity to the wireless-power-transmitting device; establishing a data-traffic profile associated with the wireless-power-receiving device, the data-traffic profile including identifications of data signals to be exchanged over a predetermined frequency band between the wireless-power-receiving device and the wireless-power-transmitting device using the wireless data transceiver, determining windows of time during which to transmit wireless-power signals over the predetermined frequency band to the wireless-power-receiving device based on the data-traffic profile; and at the determined windows of time, transmitting, by the one or more antennas, wireless-power signals over the predetermined frequency band to the wireless-power-receiving device.

IPC Classes  ?

• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H04B 5/00 - Near-field transmission systems, e.g. inductive or capacitive transmission systems
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 50/90 - Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
• H02J 50/30 - Circuit arrangements or systems for wireless supply or distribution of electric power using light, e.g. lasers
• H02J 50/12 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
• H02J 50/15 - Circuit arrangements or systems for wireless supply or distribution of electric power using ultrasonic waves
• H02J 50/10 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling

Abstract

Systems and methods for controlling and managing operation of one or more power amplifiers to optimize the performance of one or more antennas are disclosed. An example wireless-power transmission system includes a power amplifier, one or more antennas, and one or more integrated circuits. The one or more integrated circuits are configured to adjust power provided to the one or more antennas from a power amplifier and adjust a power distribution for the transmission field based, in part, on the adjusted power provided to the one or more antennas from the power amplifier such that the adjusted power provided is evenly distributed across the power distribution for the transmission field of the antenna. The even distribution of the adjusted power results in a reduced power loss at an edge of the power distribution for the transmission field of the antenna from 30% to 10%.

IPC Classes  ?

• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/00 - Circuit arrangements or systems for wireless supply or distribution of electric power
• H02J 50/90 - Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment

Abstract

An exemplary embodiment of a wireless power receiver comprises a wireless-power-receiving antenna configured to receive radio frequency (RF) signals, and convert energy from the received RF signals into an alternating current. The power receiver also comprises a primary rectifier configured to: (i) receive a first portion of the alternating current, and (ii) rectify the first portion of the alternating current into primary direct current having a first power level, the primary direct current used to provide power or charge to an electronic device; and a secondary rectifier configured to: (i) receive a second portion of the alternating current, and (ii) rectify the second portion of the alternating current into a secondary direct current having a second power level. The second power level of the secondary direct current is less than the first power level of the primary direct current.

IPC Classes  ?

• H02J 50/27 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of receiving antennas, e.g. rectennas
• H02J 50/23 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas

Abstract

A charging pad for transmitting wireless power waves for charging an electronic device is disclosed. The charging pad includes transmitting antenna elements that are configured to be selectively activated to transmit wireless power waves to the electronic device for wireless charging. The charging pad includes a charging surface including a guiding contour that aligns a position of the electronic device on the charging surface such that a transmitting antenna element is within a predetermined distance of the electronic device and has a predetermined coupling efficiency. The charging pad further includes a transmitter controller integrated circuit (IC). The transmitter controller IC is configured to detect the position of the electronic device on the charging surface and selectively activate at least one transmitting antenna element based on a determination that the at least one transmitting antenna element is within the predetermined distance of the electronic device and has the predetermined coupling efficiency.

IPC Classes  ?

• H02J 50/23 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas
• H02J 50/27 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of receiving antennas, e.g. rectennas
• H04B 5/79 - Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for data transfer in combination with power transfer

Abstract

Near-field antennas and methods of operating and manufacturing near-field antennas are provided herein. An example near-field antenna for transmitting radio frequency (RF) power transmission signals includes: (i) a conductive plate including one or more channels extending through the conductive place, a respective channel of the one or more channels having first and second segments, and (ii) a feed element configured to direct a plurality of RF power transmission signals towards the conductive plate. At least some of the RF power transmission signals cause an accumulation of RF energy within a near-field distance of the conductive plate. Furthermore, the accumulation of RF energy includes: (i) a first zone of accumulated RF energy at the first segment, and (ii) a second zone of accumulated RF energy at the second segment, the second zone of accumulated RF energy being distinct from the first zone of accumulated RF energy.

IPC Classes  ?

• H02J 50/23 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas
• H01Q 9/04 - Resonant antennas
• H04B 5/00 - Near-field transmission systems, e.g. inductive or capacitive transmission systems
• H02J 50/12 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
• H01Q 1/38 - Structural form of radiating elements, e.g. cone, spiral, umbrella formed by a conductive layer on an insulating support
• H02J 50/27 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of receiving antennas, e.g. rectennas
• H01Q 1/24 - SupportsMounting means by structural association with other equipment or articles with receiving set
• B60L 53/12 - Inductive energy transfer
• H01F 38/14 - Inductive couplings
• H01Q 13/10 - Resonant slot antennas
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 50/00 - Circuit arrangements or systems for wireless supply or distribution of electric power

Abstract

Techniques are described for managing operations of a wireless-power-transmitting device, capable of operating in multiple radio-frequency (RF) bands. An example integrated circuit includes (i) an interface to couple with a power amplifier, (ii) an encryption block configured to authorize wireless-power-receiving devices, and (iii) a processing subsystem. The processing subsystem is configured to determine, using the encryption block, that multiple wireless-power-receiving devices are authorized to receive wirelessly-delivered power at multiple distinct frequencies. And after determining that the multiple wireless-power-receiving devices are authorized to receive wirelessly-delivered power, the processing subsystem provides multiple input signals, including signals having different respective frequencies, to the power amplifiers via the interface, to be amplified such that, when the amplified signals are sent to antennas, the antennas transmit RF signals to multiple receivers at multiple frequencies. The processing subsystem, interface, and encryption block are on a single integrated circuit.

IPC Classes  ?

• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H04W 4/80 - Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 50/23 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas
• H02J 7/02 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
• H04B 5/00 - Near-field transmission systems, e.g. inductive or capacitive transmission systems

Abstract

A wireless power transmitting system includes a power amplifier comprising a plurality of measurement points and a power amplifier controller integrated circuit (IC). In some embodiments, the power amplifier controller IC performs synchronization of the various components of the power amplifier, conducts impedance and temperature measurements at the measurements points, determines if a foreign object is within the transmission range of the wireless power transmitter, and decides if a shutdown of the power amplifier is needed. In some embodiments, the power amplifier controller IC determines through a transmitter controller IC, the presence of a foreign object within the transmission range and adjusts the power transmission to one or more receivers.

IPC Classes  ?

• H02J 50/60 - Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings
• G01K 7/22 - Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat using resistive elements the element being a non-linear resistance, e.g. thermistor
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves

Abstract

An example transmitter comprises a housing with a top surface that allows for placement of a ring device to be wirelessly charged by the transmitter, the ring device is a device that is capable of receiving a power from the transmitter. An antenna, placed inside of the housing and disposed below the top surface, configured to transmit radio frequency (“RF”) waves to the ring device, where a radiator of the antenna has a circular shape that is positioned coplanar with the inner surface of the housing and the radiator has a certain thickness that is defined by an inner radiator diameter and an outer radiator diameter; and the inner radiator diameter of the radiator is substantially equal to the first inner ring diameter of the smallest ring device, and the outer radiator diameter of the radiator is substantially equal to the first outer ring diameter of the largest ring device.

IPC Classes  ?

• H02J 50/23 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas
• H01Q 7/00 - Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
• H01Q 9/04 - Resonant antennas
• H02J 50/00 - Circuit arrangements or systems for wireless supply or distribution of electric power
• H02J 50/27 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of receiving antennas, e.g. rectennas
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Abstract

A near-field charging system for wirelessly charging electronic devices using electromagnetic energy having a low frequency is provided. The near-field charging system comprises: (A) a transmitting antenna comprising: a first substrate; and a first antenna, coupled to the first substrate, that follows a first meandering pattern having a first length, wherein the transmitting antenna has a first port impedance, and (B) a receiving antenna comprising: a second substrate; and a second antenna, coupled to the second substrate, that follows a second meandering pattern having a second length, wherein: (i) the second length is less than the first length, and (ii) the receiving antenna has a second port impedance that is less than the first port impedance. The transmitting antenna is configured to transmit electromagnetic energy having a frequency at or below 60 MHz to the receiving antenna at an efficiency above 90%.

IPC Classes  ?

• H02J 50/10 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/00 - Circuit arrangements or systems for wireless supply or distribution of electric power
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices

Abstract

A wireless-power transmitter including an antenna including a plurality of power-transfer points, The antenna is configured to operate in multiple modes. The multiple modes include a standby mode and a single receiver power-transfer mode. The standby mode provides a signal to the antenna at predetermined time intervals. The signal causes the antenna to transmit electromagnetic energy that is below a threshold amount, and produce an electric field that is substantially equally distributed at each of the power-transfer points. The single receiver power- transfer mode is activated upon a wireless power-receiver coupling with one of the plurality of power-transfer points such that (i) a portion of the electric field is greater at the one of the plurality of the power-transfer points than at any other of the power-transfer points, and (ii) electromagnetic energy is transferred from the antenna to the wireless power-receiver at the one of the plurality of the power-transfer points.

IPC Classes  ?

• H02J 50/10 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling

Abstract

A wireless-power transmitter including an antenna including a plurality of power-transfer points. The antenna is configured to operate in multiple modes. The multiple modes include a standby mode and a single receiver power-transfer mode. The standby mode provides a signal to the antenna at predetermined time intervals. The signal causes the antenna to transmit electromagnetic energy that is below a threshold amount, and produce an electric field that is substantially equally distributed at each of the power-transfer points. The single receiver power-transfer mode is activated upon a wireless power-receiver coupling with one of the plurality of power-transfer points such that (i) a portion of the electric field is greater at the one of the plurality of the power-transfer points than at any other of the power-transfer points, and (ii) electromagnetic energy is transferred from the antenna to the wireless power-receiver at the one of the plurality of the power-transfer points.

IPC Classes  ?

• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02J 50/05 - Circuit arrangements or systems for wireless supply or distribution of electric power using capacitive coupling
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices

Abstract

A wireless-power transmission system (WPTS) includes sensors, antennas, a power amplifier (PA), and integrated circuits (ICs). The antennas, upon receiving an amplified signal for the PA, are configured to radiate energy within a transmission field (TF) of the WPTS. The ICs are configured to receive sensor data indicating presence of an object within a keep-out zone (KOZ), The ICs are configured to classify using the sensor data the object as a sensitive object. "While detecting presence of the sensitive object, the ICs are configured to forgo providing an instruction to the PA to amplify the signal. In accordance with a determination that the sensitive object is no longer detected the ICs are configured to determine whether an electronic device is within the TF and in accordance with a determination that the electronic device is within the TF the ICs are configured to instruct the PA to amplify the signal.

IPC Classes  ?

• H02J 50/60 - Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings
• G01R 27/02 - Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• G01S 5/02 - Position-fixing by co-ordinating two or more direction or position-line determinationsPosition-fixing by co-ordinating two or more distance determinations using radio waves

Abstract

A wireless-power transmission system (WPTS) includes sensors, antennas, a power amplifier (PA), and integrated circuits (ICs). The antennas, upon receiving an amplified signal for the PA, are configured to radiate energy within a transmission field (TF) of the WPTS. The ICs are configured to receive sensor data indicating presence of an object within a keep-out zone (KOZ). The ICs are configured to classify using the sensor data the object as a sensitive object. While detecting presence of the sensitive object, the ICs are configured to forgo providing an instruction to the PA to amplify the signal. In accordance with a determination that the sensitive object is no longer detected the ICs are configured to determine whether an electronic device is within the TF and in accordance with a determination that the electronic device is within the TF the ICs are configured to instruct the PA to amplify the signal.

IPC Classes  ?

• G01S 13/04 - Systems determining presence of a target
• H01Q 3/28 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elementsArrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture varying the amplitude
• G01V 3/02 - Electric or magnetic prospecting or detectingMeasuring magnetic field characteristics of the earth, e.g. declination or deviation operating with propagation of electric current
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 50/60 - Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings

Abstract

A near-field charging system for wirelessly charging electronic devices using electromagnetic energy having a low frequency is provided. The near-field charging system comprises: (A) a transmitting antenna comprising: a first substrate; and a first antenna, coupled to the first substrate, that follows a first meandering pattern having a first length, wherein the transmitting antenna has a first port impedance, and (B) a receiving antenna comprising: a second substrate; and a second antenna, coupled to the second substrate, that follows a second meandering pattern having a second length, wherein: (i) the second length is less than the first length, and (ii) the receiving antenna has a second port impedance that is less than the first port impedance. The transmitting antenna is configured to transmit electromagnetic energy having a frequency at or below 60 MHz to the receiving antenna at an efficiency above 90%.

IPC Classes  ?

• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02J 50/23 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas
• H02J 50/27 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of receiving antennas, e.g. rectennas
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices

Abstract

Systems and methods for wireless power transmission based on object identification are provided. A radio frequency wireless power transmitter is in communication with a video camera for capturing image data (e.g., a visual pattern) of at least a portion of a transmission field of the radio frequency wireless power transmitter. A processor of the radio frequency wireless power transmitter is configured to identify an object when the visual pattern matches a pre-stored visual pattern representing the object, and control transmission of one or more radio frequency power transmission waves to a receiving electronic device based on a location of the identified object, wherein the receiving electronic device uses the one or more radio frequency power transmission waves to power or to charge the receiving electronic device.

IPC Classes  ?

• G06V 20/52 - Surveillance or monitoring of activities, e.g. for recognising suspicious objects
• H04B 5/00 - Near-field transmission systems, e.g. inductive or capacitive transmission systems
• H02J 50/90 - Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H02J 50/60 - Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• G06T 7/60 - Analysis of geometric attributes
• H04N 5/04 - Synchronising
• H04N 7/18 - Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
• G06V 10/42 - Global feature extraction by analysis of the whole pattern, e.g. using frequency domain transformations or autocorrelation
• G06V 30/224 - Character recognition characterised by the type of writing of printed characters having additional code marks or containing code marks

Abstract

An exemplary embodiment of secure wireless transmission of power using unidirectional communication signals from a wireless-power-receiving device. The method includes, receiving, from a wireless-power-transmitting device that includes a first communications radio, a first wireless-power-transmission signal at a wireless-power-receiving device that includes a second communications radio. In response to receiving the first wireless-power-transmission signal: broadcasting, via the second communications radio of the wireless-power-receiving device and without establishing a communications channel between the first and second communications radios, a data packet, the data packet including information identifying (i) at least one power requirement of a power source of the wireless-power-receiving device (ii) an amount of power received by the wireless-power-receiving device from the first wireless-power-transmission signal. After broadcasting the data packet, receiving, from the wireless-power-transmitting device, additional wireless-power-transmission signals at the wireless-power-receiving device, wherein the wireless-power-transmitting device transmits each of the additional wireless-power-transmission signals using a predetermined sequence of different transmission characteristics.

IPC Classes  ?

• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H02J 50/23 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 50/27 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of receiving antennas, e.g. rectennas
• H02J 50/60 - Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Abstract

An exemplary embodiment of secure wireless transmission of power using unidirectional communication signals from a wireless-power-receiving device. The method includes, receiving, from a wireless-power-transmitting device that includes a first communications radio, a first wireless-power-transmission signal at a wireless-power-receiving device that includes a second communications radio. In response to receiving the first wireless-power- transmission signal: broadcasting, via the second communications radio of the wireless- power-receiving device and without establishing a communications channel between the first and second communications radios, a data packet, the data packet including information identifying (i) at least one power requirement of a power source of the wireless-power- receiving device (ii) an amount of power received by the wireless-power-receiving device from the first wireless-power-transmission signal. After broadcasting the data packet, receiving, from the wireless-power-transmitting device, additional wireless-power- transmission signals at the wireless-power-receiving device, wherein the wireless-power- transmitting device transmits each of the additional wireless-power-transmission signals using a predetermined sequence of different transmission characteristics.

IPC Classes  ?

• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H04L 29/06 - Communication control; Communication processing characterised by a protocol
• H04W 4/80 - Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication

Abstract

A method of charging multiple receivers, the method includes: (i) receiving, via the communication radio, first data that allows the transmitter to determine a locations for a first receiver and a second receiver, (ii) determining waveform features used to transmit wireless power waves focused at the location of the first receiver, (iii) determining waveform features used to transmit wireless power waves focused at the location of the second receiver, (iv) causing a first subset of antennas to transmit wireless-power waves having the first waveform features to create focused energy at the location of the first receiver and (v) causing a second subset of antennas to transmit wireless-power waves having the second waveform features to create focused energy at the second location of the second receiver, where transmitting the wireless-power waves having the first waveform features occurs while transmitting the wireless-power waves having the second waveform features.

IPC Classes  ?

• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H05B 3/34 - Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs
• A61B 8/00 - Diagnosis using ultrasonic, sonic or infrasonic waves
• B60L 55/00 - Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
• A61B 5/145 - Measuring characteristics of blood in vivo, e.g. gas concentration or pH-value

Abstract

Disclosed is a wireless power transmitter for wirelessly delivering power to a receiver device, the wireless power transmitter including: a plurality of unit cells configured to radiate one or more radio frequency (RF) power transmission waves, each unit cell in the plurality of unit cells including: (i) a metal portion having an interior perimeter that surrounds an aperture defined by the metal portion; and (ii) an antenna that is aligned with the aperture in a first dimension, the antenna being configured to radiate one or more RF power transmission waves for wirelessly charging a receiver device. The one or more RF power transmission waves leak from the wireless power transmitter at least in part through the aperture when the receiver device is positioned within a threshold distance from the unit cell.

IPC Classes  ?

• H02J 7/04 - Regulation of the charging current or voltage
• H02J 50/23 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas
• H02J 50/10 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
• H04B 1/3883 - Arrangements for mounting batteries or battery chargers
• H04W 8/00 - Network data management
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Abstract

A method includes receiving a wireless communication signal indicating that a receiver is within a wireless-power-transmission range of a transmitter. In response to the receiving, the method further includes transmitting a plurality of radio frequency (RF) test signals using at least two test phases for a respective antenna. The method further includes receiving information identifying a first amount of power delivered to the receiver by a first RF test signal transmitted at a first of the at least two test phases, receiving information identifying a second amount of power delivered to the receiver by a second RF test signal transmitted at a second of the at least two test phases, and determining, based on the first and second amounts of power, an optimal phase for the respective antenna.

IPC Classes  ?

• H04B 17/00 - MonitoringTesting
• H04B 17/12 - MonitoringTesting of transmitters for calibration of transmit antennas, e.g. of amplitude or phase
• H04B 17/24 - MonitoringTesting of receivers with feedback of measurements to the transmitter
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 50/00 - Circuit arrangements or systems for wireless supply or distribution of electric power

Abstract

An example near-field charging system includes a housing that includes a charging surface and at least one other surface, a radiating antenna, and a non -radiating element positioned above the radiating antenna within the housing such that the non-radiating element is closer to the charging surface than the radiating antenna. The radiating antenna produces a first electromagnetic-field distribution that is received by a receiver, the first electromagnetic-field provides usable power when the receiver is placed at any position on a first portion of the charging surface. The non-radiating element changes a distribution characteristic of the first electromagnetic-field distribution to produce a second electromagnetic-field distribution, the second electromagnetic-field distribution providing usable power to the receiver when the receiver is placed at any position across a second portion of the charging surface of the housing, and the second portion is at least 10% percent greater than the first portion.

IPC Classes  ?

• H02J 50/90 - Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/00 - Circuit arrangements or systems for wireless supply or distribution of electric power
• H01Q 9/04 - Resonant antennas
• H01Q 1/24 - SupportsMounting means by structural association with other equipment or articles with receiving set
• H04R 1/10 - EarpiecesAttachments therefor

Abstract

An example near-field charging system includes a housing that includes a charging surface and at least one other surface, a radiating antenna, and a non-radiating element positioned above the radiating antenna within the housing such that the non-radiating element is closer to the charging surface than the radiating antenna. The radiating antenna produces a first electromagnetic-field distribution that is received by a receiver, the first electromagnetic-field provides usable power when the receiver is placed at any position on a first portion of the charging surface. The non-radiating element changes a distribution characteristic of the first electromagnetic-field distribution to produce a second electromagnetic-field distribution, the second electromagnetic-field distribution providing usable power to the receiver when the receiver is placed at any position across a second portion of the charging surface of the housing, and the second portion is at least 10% percent greater than the first portion.

IPC Classes  ?

• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 7/02 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H01Q 9/42 - Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
• H01Q 9/04 - Resonant antennas
• H01Q 9/16 - Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole

Abstract

A method of wireless power transmission includes transmitting, via antenna elements of an antenna array, a plurality of first signals having a first phase and a first gain. The method further includes determining a location of a receiver device based on the plurality of first signals transmitted by the antenna elements of the antenna array. The method includes adjusting, for the antenna elements of the antenna array, one of a phase and a gain based on the location of the receiver device. The method includes transmitting, via the antenna elements, a plurality of second signals having a second phase or a second gain such that the plurality of second signals are focused at a focus region that is approximately the size of an antenna array of the receiver device and provide energy at the focus region that is converted by the receiver device into usable power.

IPC Classes  ?

• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices

Abstract

A method includes receiving an indication that a wireless-power receiver is located within one meter of a wireless-power transmission system and is authorized to receive wirelessly-delivered power from a wireless-power transmission system. The method includes, in response to receiving the indication, selecting a power level at which to amplify a radio frequency (RF) signal using a power amplifier (PA). In accordance with a determination that transmitting the RF signal to the wireless-power receiver would satisfy safety thresholds, the method includes instructing the PA to amplify the RF signal using the power level to create an amplified RF signal, and providing the amplified RF signal to the one or more antennas. The one or more antennas are caused to, upon receiving the amplified RF signal, radiate RF energy that is focused within an operating area that includes the wireless-power receiver while forgoing any active beamforming control.

IPC Classes  ?

• H02J 50/90 - Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/00 - Circuit arrangements or systems for wireless supply or distribution of electric power

Abstract

A near-field antenna is provided, which includes: a first dipole antenna, formed along a first axis, having a first meandering shape and a second dipole antenna, formed along a second axis different from the first axis, having a second meandering shape. The antenna also includes (i) a power amplifier configured to feed electromagnetic signals to at least one of the first and second dipole antennas, (ii) an impedance-adjusting component configured to adjust an impedance of at least one of the first and second dipole antennas, and (iii) switch circuitry configured to switchably couple the first dipole antenna, the power amplifier, the second dipole antenna, and the impedance-adjusting component.

IPC Classes  ?

• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 50/23 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas
• H02J 7/02 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
• H04B 5/00 - Near-field transmission systems, e.g. inductive or capacitive transmission systems
• H04W 4/80 - Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication

Abstract

An example method is provided for detecting and classifying foreign objects, performed at a computer system having one or more processors and memory storing one or more programs configured for execution by the one or more processors. The method includes obtaining a plurality of electrical measurements while a wireless-power-transmitting antenna is transmitting different power beacons. The method also includes forming a feature vector according to the plurality of electrical measurements. The method further includes detecting a presence of one or more foreign objects prior to transmitting wireless power to one or more wireless power receivers by inputting the feature vector to trained one or more classifiers, wherein each classifier is a machine-learning model trained to detect foreign objects distinct from the one or more wireless power receivers.

IPC Classes  ?

• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 50/60 - Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings

Abstract

A method includes receiving an indication that a wireless-power receiver is located within one meter of a wireless-power transmission system and is authorized to receive wirelessly-delivered power from a wireless-power transmission system. The method includes, in response to receiving the indication, selecting a power level at which to amplify a radio frequency (RF) signal using a power amplifier (PA). In accordance with a determination that transmitting the RF signal to the wireless-power receiver would satisfy safety thresholds, the method includes instructing the PA to amplify the RF signal using the power level to create an amplified RF signal, and providing the amplified RF signal to the one or more antennas. The one or more antennas are caused to, upon receiving the amplified RF signal, radiate RF energy that is focused within an operating area that includes the wireless-power receiver while forgoing any active beamforming control.

IPC Classes  ?

• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H04B 5/00 - Near-field transmission systems, e.g. inductive or capacitive transmission systems
• H04W 4/80 - Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication

Abstract

An example system charges an electronic device using wirelessly transmitted radio-frequency power (RF) waves. The system includes the electronic device with one or more movable arms. At least one movable arm includes a receiving antenna element. The system further includes a charging pad that includes a housing. The housing includes at least one guiding contour on a surface that is configured for align a position of the electronic device on the surface of the housing. The charging pad further includes transmitting antenna elements that are selectively activated to transmit radio-frequency power waves to the receiving antenna element of the electronic device. The system also includes a transmitter controller integrated circuit (IC) configured to selectively activate a respective transmitting antenna element of the transmitting antenna elements. Activating the respective transmitting antenna element causes transmission of the radio-frequency power waves to the receiving antenna element of the electronic device.

IPC Classes  ?

• H02J 50/23 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas
• H04B 5/00 - Near-field transmission systems, e.g. inductive or capacitive transmission systems
• H02J 50/27 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of receiving antennas, e.g. rectennas

Abstract

An example system charges an electronic device using wirelessly transmitted radio- frequency power (RF) waves. The system includes the electronic device with one or more movable arms. At least one movable arm includes a receiving antenna element. The system further includes a charging pad that includes a housing. The housing includes at least one guiding contour on a surface that is configured for align a position of the electronic device on the surface of the housing. The charging pad further includes transmitting antenna elements that are selectively activated to transmit radio-frequency power waves to the receiving antenna element of the electronic device. The system also includes a transmitter controller integrated circuit (IC) configured to selectively activate a respective transmitting antenna element of the transmitting antenna elements. Activating the respective transmitting antenna element causes transmission of the radio-frequency power waves to the receiving antenna element of the electronic device

IPC Classes  ?

• H02J 50/90 - Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/00 - Circuit arrangements or systems for wireless supply or distribution of electric power
• H04B 5/00 - Near-field transmission systems, e.g. inductive or capacitive transmission systems

Abstract

Embodiments disclosed herein describe a wireless power receiver including a synchronous transistor rectifier using a Class-E or a Class-F amplifier. The wireless power receiver includes at least one radio frequency (RF) antenna configured to generate an alternating current (AC) waveform from received RF waves. The wireless power receiver further includes a power line configured to carry a first signal based on the AC current generated by the least one RF antenna, and a tap-line coupled to the power line, the tap-line being configured to carry a second signal. The second signal is based on the AC current generated by the least one RF antenna and distinct from the first signal. The wireless power receiver also includes a transistor coupled to at least the power line and the tap-line. The transistor is configured to provide a direct current (DC) waveform to a load based on the first and second signals.

IPC Classes  ?

• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02J 7/14 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
• H02J 50/12 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
• H03F 1/32 - Modifications of amplifiers to reduce non-linear distortion
• H03F 3/217 - Class D power amplifiersSwitching amplifiers
• H03F 3/193 - High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only with field-effect devices
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
• H02M 7/217 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

An example integrated circuit includes: (i) a processing subsystem configured to control operation of the integrated circuit, (ii) a waveform generator, operatively coupled to the processing subsystem, configured to generate radio frequency (RF) power transmission signals using an input current, (iii) a first digital interface that couples the integrated circuit with a plurality of power amplifiers that are external to the integrated circuit, and (iv) a second digital interface, distinct from the first digital interface, that couples the integrated circuit with a wireless communication component that is external to the integrated circuit. The processing subsystem is configured to: receive, via the second digital interface, an indication that a receiver is within transmission range of a transmitting device controlled by the circuit, and in response to receiving the indication: provide, via the first digital interface, the RF power transmission signals to at least one of the plurality of power amplifiers.

IPC Classes  ?

• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 7/02 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 50/23 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas
• H04B 5/00 - Near-field transmission systems, e.g. inductive or capacitive transmission systems
• H04W 4/80 - Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication

Abstract

The wireless power receiver includes at least one wire of a sound-producing device. The at least one wire configured for both conveying sound signals or securing at least part of the sound-producing device to a user, and receiving power waves. The wireless power receiver also includes power harvesting circuitry coupled with the at least one wire and a power source of an electronic device, like a battery. The power harvesting circuitry is configured to isolate the received power waves from the conveyed sound signals, convert the received power waves to usable energy, and provide the usable energy to the power source of the electronic device.

IPC Classes  ?

• H04R 25/00 - Deaf-aid sets
• H04R 1/10 - EarpiecesAttachments therefor
• H04R 23/00 - Transducers other than those covered by groups
• H04B 7/14 - Relay systems
• H04B 1/3827 - Portable transceivers
• H04B 10/114 - Indoor or close-range type systems
• H04B 10/80 - Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups , e.g. optical power feeding or optical transmission through water
• H04R 5/033 - Headphones for stereophonic communication

Abstract

A method includes receiving an indication that a wireless-power receiver is located within one meter of a wireless-power transmission system and is authorized to receive wirelessly-delivered power from a wireless-power transmission system. The method includes, in response to receiving the indication, selecting a power level at which to amplify a radio frequency (RF) signal using a power amplifier (PA). In accordance with a determination that transmitting the RF signal to the wireless-power receiver would satisfy safety thresholds, the method includes instructing the PA to amplify the RF signal using the power level to create an amplified RF signal, and providing the amplified RF signal to the one or more antennas. The one or more antennas are caused to, upon receiving the amplified RF signal, radiate RF energy that is focused within an operating area that includes the wireless-power receiver while forgoing any active beamforming control.

IPC Classes  ?

• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/00 - Circuit arrangements or systems for wireless supply or distribution of electric power
• H02J 50/90 - Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment

Abstract

Embodiments disclosed herein may generate and transmit power waves that, as result of their physical waveform characteristics (e.g., frequency, amplitude, phase, gain, direction), converge at a predetermined location in a transmission field to generate a pocket of energy. Receivers associated with an electronic device being powered by the wireless charging system, may extract energy from these pockets of energy and then convert that energy into usable electric power for the electronic device associated with a receiver. The pockets of energy may manifest as a three-dimensional field (e.g., transmission field) where energy may be harvested by a receiver positioned within or nearby the pocket of energy.

IPC Classes  ?

• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/60 - Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings
• H04N 7/18 - Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
• H04B 5/00 - Near-field transmission systems, e.g. inductive or capacitive transmission systems
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H02J 50/90 - Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
• H04W 52/28 - TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non-transmission
• G06V 40/10 - Human or animal bodies, e.g. vehicle occupants or pedestriansBody parts, e.g. hands

Goods & Services

Product development

Goods & Services

Product development

Abstract

An example method is provided for detecting and classifying foreign objects, performed at a computer system having one or more processors and memory storing one or more programs configured for execution by the one or more processors. The method includes obtaining a plurality of electrical measurements while a wireless-power-transmitting antenna is transmitting different power beacons. The method also includes forming a feature vector according to the plurality of electrical measurements. The method further includes detecting a presence of one or more foreign objects prior to transmitting wireless power to one or more wireless power receivers by inputting the feature vector to trained one or more classifiers, wherein each classifier is a machine-learning model trained to detect foreign objects distinct from the one or more wireless power receivers.

IPC Classes  ?

• H02J 50/60 - Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings
• H02J 50/27 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of receiving antennas, e.g. rectennas
• G06N 20/00 - Machine learning
• G06K 9/62 - Methods or arrangements for recognition using electronic means
• H04B 5/00 - Near-field transmission systems, e.g. inductive or capacitive transmission systems

Abstract

An exemplary embodiment of a wireless power receiver comprises a wireless-power receiving antenna configured to receive radio frequency (RF) signals, and convert energy from the received RF signals into an alternating current. The power receiver also comprises a primary rectifier configured to: (i) receive a first portion of the alternating current, and (ii) rectify the first portion of the alternating current into primary direct current having a first power level, the primary direct current used to provide power or charge to an electronic device; and a secondary rectifier configured to: (i) receive a second portion of the alternating current, and (ii) rectify the second portion of the alternating current into a secondary direct current having a second power level. The second power level of the secondary direct current is less than the first power level of the primary direct current.

IPC Classes  ?

• H02J 50/27 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of receiving antennas, e.g. rectennas
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H04B 5/00 - Near-field transmission systems, e.g. inductive or capacitive transmission systems

Abstract

A wireless power transmitting system includes a power amplifier comprising a plurality of measurement points and a power amplifier controller integrated circuit (IC). In some embodiments, the power amplifier controller IC performs synchronization of the various components of the power amplifier, conducts impedance and temperature measurements at the measurements points, determines if a foreign object is within the transmission range of the wireless power transmitter, and decides if a shutdown of the power amplifier is needed. In some embodiments, the power amplifier controller IC determines through a transmitter controller IC, the presence of a foreign object within the transmission range and adjusts the power transmission to one or more receivers.

IPC Classes  ?

• H02J 50/60 - Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings
• H02J 50/27 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of receiving antennas, e.g. rectennas
• H03F 3/20 - Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
• H04B 5/00 - Near-field transmission systems, e.g. inductive or capacitive transmission systems
• H03F 3/45 - Differential amplifiers

Abstract

A wireless power transmitting system includes a power amplifier comprising a plurality of measurement points and a power amplifier controller integrated circuit (IC). In some embodiments, the power amplifier controller IC performs synchronization of the various components of the power amplifier, conducts impedance and temperature measurements at the measurements points, determines if a foreign object is within the transmission range of the wireless power transmitter, and decides if a shutdown of the power amplifier is needed. In some embodiments, the power amplifier controller IC determines through a transmitter controller IC, the presence of a foreign object within the transmission range and adjusts the power transmission to one or more receivers.

IPC Classes  ?

• H02J 50/60 - Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings
• G01K 7/22 - Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat using resistive elements the element being a non-linear resistance, e.g. thermistor
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves

Abstract

A wireless-power receiver includes an antenna coupled to a rectifier, and a depletion-mode switch coupled to the rectifier. The depletion-mode switch can create an impedance mismatch or an impedance match between the rectifier and the antenna. While the depletion-mode switch is in a default-closed state, it creates an impedance mismatch between the rectifier and the antenna. A first amount of alternating current received by the antenna as radio frequency (RF) signals is reflected away from the rectifier's input due to the impedance mismatch. A second amount of the alternating current causes the depletion-mode switch to begin transitioning to an open state, creating an impedance match between the rectifier and the antenna. While the depletion-mode switch is in the open state, creating an impedance match between the rectifier and the antenna, alternating current received by the antenna flows through the rectifier's input to be converted into direct current.

IPC Classes  ?

• H02J 50/27 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of receiving antennas, e.g. rectennas
• H02J 50/23 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas

Abstract

A near-field charging system for wirelessly charging electronic devices using electromagnetic energy having a low frequency is provided. The near-field charging system comprises: (A) a transmitting antenna comprising: a first substrate; and a first antenna, coupled to the first substrate, that follows a first meandering pattern having a first length, wherein the transmitting antenna has a first port impedance, and (B) a receiving antenna comprising: a second substrate; and a second antenna, coupled to the second substrate, that follows a second meandering pattern having a second length, wherein: (i) the second length is less than the first length, and (ii) the receiving antenna has a second port impedance that is less than the first port impedance. The transmitting antenna is configured to transmit electromagnetic energy having a frequency at or below 60 MHz to the receiving antenna at an efficiency above 90%.

IPC Classes  ?

• H01Q 1/38 - Structural form of radiating elements, e.g. cone, spiral, umbrella formed by a conductive layer on an insulating support
• H01Q 1/22 - SupportsMounting means by structural association with other equipment or articles
• H01Q 1/24 - SupportsMounting means by structural association with other equipment or articles with receiving set

Goods & Services

Software for sending and receiving wireless power, namely, software for management, control, regulation and wireless transfer of electrical power; computer hardware, namely, receivers and electrical components and antennae for wireless transfer and reception of electrical power; software for management and control of rechargeable energy storage systems and to power electrical and electronic devices and systems.. Platform as a service (paas) featuring computer software platforms for use in managing, controlling, regulating, and transferring electrical power; providing online non-downloadable software for use in management, visualization, and control of wireless electrical charging systems..

Abstract

A near-field charging system for wirelessly charging electronic devices using electromagnetic energy having a low frequency is provided. The near-field charging system comprises: (A) a transmitting antenna comprising: a first substrate; and a first antenna, coupled to the first substrate, that follows a first meandering pattern having a first length, wherein the transmitting antenna has a first port impedance, and (B) a receiving antenna comprising: a second substrate; and a second antenna, coupled to the second substrate, that follows a second meandering pattern having a second length, wherein: (i) the second length is less than the first length, and (ii) the receiving antenna has a second port impedance that is less than the first port impedance. The transmitting antenna is configured to transmit electromagnetic energy having a frequency at or below 60 MHz to the receiving antenna at an efficiency above 90%.

IPC Classes  ?

• H01Q 9/27 - Spiral antennas
• H01Q 1/38 - Structural form of radiating elements, e.g. cone, spiral, umbrella formed by a conductive layer on an insulating support

Abstract

A system for wireless-power transmission includes a radio-frequency wireless-power transmitter that is in communication with a sensor for acquiring data for motion recognition and tracking of a plurality of objects within at least a portion of a transmission field of the radio-frequency wireless-power transmitter; and one or more processors of the radio-frequency wireless-power transmitter configured to: detect location and displacement of an object of the plurality of objects within the transmission field; and send instructions to cause adjustments to transmission of one or more radio-frequency power-transmission waves by the radio-frequency wireless-power transmitter to a receiving electronic device based on the location and displacement of the object. The receiving electronic device is configured to use energy from the one or more radio-frequency power-transmission waves to (i) power the receiving electronic device and/or (ii) to charge a power source of the receiving electronic device.

IPC Classes  ?

• H02J 50/60 - Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H02J 50/90 - Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment

Abstract

A method includes receiving a wireless communication signal indicating that a receiver is within a wireless-power-transmission range of a transmitter. In response to the receiving, the method further includes transmitting a plurality of radio frequency (RF) test signals using at least two test phases for a respective antenna. The method further includes receiving information identifying a first amount of power delivered to the receiver by a first RF test signal transmitted at a first of the at least two test phases, receiving information identifying a second amount of power delivered to the receiver by a second RF test signal transmitted at a second of the at least two test phases, and determining, based on the first and second amounts of power, an optimal phase for the respective antenna.

IPC Classes  ?

• H04B 5/00 - Near-field transmission systems, e.g. inductive or capacitive transmission systems
• H02J 50/00 - Circuit arrangements or systems for wireless supply or distribution of electric power

Abstract

A method includes receiving a wireless communication signal indicating that a receiver is within a wireless-power-transmission range of a transmitter. In response to the receiving, the method further includes transmitting a plurality of radio frequency (RF) test signals using at least two test phases for a respective antenna. The method further includes receiving information identifying a first amount of power delivered to the receiver by a first RF test signal transmitted at a first of the at least two test phases, receiving information identifying a second amount of power delivered to the receiver by a second RF test signal transmitted at a second of the at least two test phases, and determining, based on the first and second amounts of power, an optimal phase for the respective antenna.

IPC Classes  ?

• H04B 17/00 - MonitoringTesting
• H04B 17/12 - MonitoringTesting of transmitters for calibration of transmit antennas, e.g. of amplitude or phase
• H04B 17/24 - MonitoringTesting of receivers with feedback of measurements to the transmitter
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 50/00 - Circuit arrangements or systems for wireless supply or distribution of electric power

Abstract

A wireless power receiving system includes two or more electrically small antenna arms and a common antenna ground. The two or more electrically small antenna arms are connected to the same common antenna ground and are close enough to one another to be strongly coupled. In some embodiments, the two or more electrically small antenna arms are tuned to the same functional frequency so that they load one another to create self-resonance. The wireless power receiving system receives the transmitted wireless power wave emitting from a wireless power transmitter without added lossy matching components.

IPC Classes  ?

• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 7/02 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
• H04R 25/00 - Deaf-aid sets
• H01Q 9/40 - Element having extended radiating surface

Abstract

A wireless-power receiver is disclosed including a first antenna configured to transmit first near-field radio frequency (RF) energy, a second antenna configured to receive second near-field RF energy, and a communications component configured to provide a communication signal including data indicating a location of the first wireless-power receiver. The wireless-power receiver is configured to, in accordance with a determination that the wireless-power receiver is in direct contact with a surface of another wireless-power receiver, transmit the first near-field RF energy, via the first antenna, to the other receiver. The wireless-power receiver is further configured to, in accordance with a determination, based on the data indicating the location of the wireless-power receiver, that the wireless-power receiver is within a non-zero threshold distance from the other receiver or a wireless-power transmitter, receive the second near-field RF energy, via the second antenna, from the other receiver or from the wireless-power transmitter.

IPC Classes  ?

• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02J 7/02 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
• H02J 50/23 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas
• H02J 50/10 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
• H02J 7/04 - Regulation of the charging current or voltage
• H04B 1/3883 - Arrangements for mounting batteries or battery chargers
• H04W 8/00 - Network data management

Abstract

An example method is performed at a near-field charging pad with a processor, a power-transferring element, a signature-signal-receiving circuit, and the processor of the near-field charging pad is in communication with a data source that includes predefined signature signals that each identify one of (i) a wireless power receiver, (ii) an object other than a wireless power receiver, and (iii) a combination of a wireless power receiver and an object other than a wireless power receiver. The method includes: after sending a plurality of test radio frequency (RF) power transmission signals, detecting, using the signature-signal-receiving circuit, respective amounts of reflected power; generating, based on variations in the respective amounts of reflected power, a signature signal; and determining whether (i) an authorized wireless power receiver is present on the near-field charging pad and/or (ii) an object other than a wireless power receiver is present on the near-field charging pad.

IPC Classes  ?

• H02J 50/60 - Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings
• H04B 5/00 - Near-field transmission systems, e.g. inductive or capacitive transmission systems
• H04B 17/24 - MonitoringTesting of receivers with feedback of measurements to the transmitter
• H04B 17/29 - Performance testing
• H04B 17/21 - MonitoringTesting of receivers for calibrationMonitoringTesting of receivers for correcting measurements
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H02J 50/05 - Circuit arrangements or systems for wireless supply or distribution of electric power using capacitive coupling
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices

Abstract

A wireless power receiving system includes two or more electrically small antenna arms and a common antenna ground. The two or more electrically small antenna arms are connected to the same common antenna ground and are close enough to one another to be strongly coupled. In some embodiments, the two or more electrically small antenna arms are tuned to the same functional frequency so that they load one another to create self-resonance. The wireless power receiving system receives the transmitted wireless power wave emitting from a wireless power transmitter without added lossy matching components.

IPC Classes  ?

• H01Q 1/27 - Adaptation for use in or on movable bodies
• H02J 50/10 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
• H01Q 1/22 - SupportsMounting means by structural association with other equipment or articles
• H01Q 9/04 - Resonant antennas
• H01Q 9/28 - Conical, cylindrical, cage, strip, gauze or like elements having an extended radiating surface Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
• H01Q 9/40 - Element having extended radiating surface
• H01Q 13/10 - Resonant slot antennas
• H04B 5/00 - Near-field transmission systems, e.g. inductive or capacitive transmission systems
• H04R 25/00 - Deaf-aid sets
• A61P 35/00 - Antineoplastic agents
• C07K 16/28 - Immunoglobulins, e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
• A61K 39/00 - Medicinal preparations containing antigens or antibodies

Abstract

A method of fabricating a near-field antenna for transmitting radio frequency (RF) power transmission signals includes selecting a set of dimensions for one or more cutouts to be defined through a conductive plate of the near-field antenna. The conductive plate has opposing first and second planar surfaces. The method includes forming the one or more cutouts through the first and second surfaces of the conductive plate in a predefined arrangement. Each of the one or more cutouts has the set of dimensions. The method includes coupling an insulator to the first surface of the conductive plate, and coupling a feed element to the insulator.

IPC Classes  ?

• H01Q 1/38 - Structural form of radiating elements, e.g. cone, spiral, umbrella formed by a conductive layer on an insulating support
• H01Q 9/04 - Resonant antennas
• H04B 5/00 - Near-field transmission systems, e.g. inductive or capacitive transmission systems
• H02J 50/12 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
• H02J 50/27 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of receiving antennas, e.g. rectennas
• H01Q 1/24 - SupportsMounting means by structural association with other equipment or articles with receiving set
• H02J 5/00 - Circuit arrangements for transfer of electric power between ac networks and dc networks
• B60L 53/12 - Inductive energy transfer
• H01F 38/14 - Inductive couplings
• H02J 50/00 - Circuit arrangements or systems for wireless supply or distribution of electric power
• H01Q 13/10 - Resonant slot antennas

Abstract

An antenna for receiving wireless power from a transmitter is provided. The antenna includes multiple antenna elements, coupled to an electronic device, configured to receive radio-frequency (RF) power waves from the transmitter, each antenna element being adjacent to at least one other antenna element. Furthermore, the multiple antenna elements are arranged so that an efficiency of reception of the RF power waves by the antenna elements remains above a predetermined threshold efficiency when a human hand is in contact with the electronic device, the predetermined threshold efficiency being at least 50%. Lastly, at least one antenna element is coupled to conversion circuitry, which is configured to (i) convert energy from the received RF power waves into usable power and (ii) provide the usable power to the electronic device for powering or charging of the electronic device.

IPC Classes  ?

• H01Q 1/24 - SupportsMounting means by structural association with other equipment or articles with receiving set
• H01Q 7/00 - Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
• H01Q 9/04 - Resonant antennas
• H01Q 9/14 - Length of element or elements adjustable
• H02J 50/27 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of receiving antennas, e.g. rectennas

Abstract

An antenna for receiving wireless power from a transmitter is provided. The antenna includes multiple antenna elements, coupled to an electronic device, configured to receive radio-frequency (RF) power waves from the transmitter, each antenna element being adjacent to at least one other antenna element. Furthermore, the multiple antenna elements are arranged so that an efficiency of reception of the RF power waves by the antenna elements remains above a predetermined threshold efficiency when a human hand is in contact with the electronic device, the predetermined threshold efficiency being at least 50%. Lastly, at least one antenna element is coupled to conversion circuitry, which is configured to (i) convert energy from the received RF power waves into usable power and (ii) provide the usable power to the electronic device for powering or charging of the electronic device.

IPC Classes  ?

• H01Q 21/20 - Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along, or adjacent to, a curvilinear path
• H01Q 1/52 - Means for reducing coupling between antennas Means for reducing coupling between an antenna and another structure
• H01Q 25/00 - Antennas or antenna systems providing at least two radiating patterns
• H01Q 21/24 - Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
• H02J 50/27 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of receiving antennas, e.g. rectennas
• H01Q 7/00 - Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop

Abstract

Systems and methods for receiving near-field wireless power at an electronic device. An electronic device includes a receiver with one or more receiving antenna elements formed by respective conductive lines in a meandering pattern. Each receiving antenna element is configured to receive near-field radio-frequency signals radiated from a transmitting antenna element of a near-field power transmitter. The receiving antenna elements are configured to receive the near-field radio-frequency signals radiated from the transmitting antenna element of the near-field power transmitter when the electronic device is on a surface of the near-field power transmitter, and the transmitting antenna element is formed by respective conductive lines in a meandering pattern. The transmitting antenna element is selectively activated from among a plurality of available transmitting antenna elements of the near-field transmitter. A power-harvesting circuit of the receiver is configured to convert the near-field radio-frequency signals into usable power for the electronic device.

IPC Classes  ?

• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 7/02 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 50/23 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas
• H04B 5/00 - Near-field transmission systems, e.g. inductive or capacitive transmission systems
• H04W 4/80 - Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication

Abstract

A microstrip antenna for use in a wireless power transmission system and a method for forming the microstrip antenna are described. The antenna includes a first multi-layer printed circuit board (PCB) that includes a top surface and a bottom surface. The top and bottom surfaces of the first multi-layer PCB include a first electrically conductive material. The antenna includes a second multi-layer PCB that includes a top surface and a bottom surface. The top and bottom surfaces of the second multi-layer PCT include a second electrically conductive material. A first plurality of vias each substantially pass through the top and bottom surfaces of the first multi-layer PCB. A second plurality of vias each substantially pass through the top and bottom surfaces of the second multi-layer PCB. The antenna further comprises a dielectric slab that is configured to receive the first multi-layer PCB and the second multi-layer PCB.

IPC Classes  ?

• H02J 50/23 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas
• H01Q 1/02 - Arrangements for de-icingArrangements for drying-out
• H05K 1/02 - Printed circuits Details
• H05K 3/30 - Assembling printed circuits with electric components, e.g. with resistor
• H05K 3/46 - Manufacturing multi-layer circuits
• H05K 1/11 - Printed elements for providing electric connections to or between printed circuits
• H01Q 1/48 - Earthing meansEarth screensCounterpoises
• H01Q 9/04 - Resonant antennas

Abstract

An example integrated circuit includes: (i) a processing subsystem configured to control operation of the integrated circuit, (ii) a waveform generator, operatively coupled to the processing subsystem, configured to generate radio frequency (RF) power transmission signals using an input current, (iii) a first digital interface that couples the integrated circuit with a plurality of power amplifiers that are external to the integrated circuit, and (iv) a second digital interface, distinct from the first digital interface, that couples the integrated circuit with a wireless communication component that is external to the integrated circuit. The processing subsystem is configured to: receive, via the second digital interface, an indication that a receiver is within transmission range of a transmitting device controlled by the circuit, and in response to receiving the indication: provide, via the first digital interface, the RF power transmission signals to at least one of the plurality of power amplifiers.

IPC Classes  ?

• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 7/02 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 50/23 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas
• H04B 5/00 - Near-field transmission systems, e.g. inductive or capacitive transmission systems
• H04W 4/80 - Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication

Abstract

Systems and methods for wireless power transmission based on object identification are provided. A radio frequency wireless power transmitter is in communication with a video camera for capturing image data (e.g., a series of image frames) of at least a portion of a transmission field of the radio frequency wireless power transmitter. One or more processors of the radio frequency wireless power transmitter are configured to (i) detect motion of an object towards the transmission field by applying motion tracking analysis on the series of image frames; and (ii) cause adjustments to transmission of one or more radio frequency power transmission waves by the radio frequency wireless power transmitter to a receiving electronic device based on the motion of the object. The receiving electronic device uses the one or more radio frequency power transmission waves to power or to charge a power source used by the receiving electronic device.

IPC Classes  ?

• H02J 7/02 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
• H04B 5/00 - Near-field transmission systems, e.g. inductive or capacitive transmission systems
• H02J 7/04 - Regulation of the charging current or voltage
• H02J 50/90 - Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H02J 50/60 - Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• G06K 9/18 - Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints using printed characters having additional code marks or containing code marks, e.g. the character being composed of individual strokes of different shape, each representing a different code value
• G06K 9/52 - Extraction of features or characteristics of the image by deriving mathematical or geometrical properties from the whole image
• G06T 7/60 - Analysis of geometric attributes
• H04N 5/04 - Synchronising
• H04N 7/18 - Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Abstract

A near-field antenna is provided, which includes: a reflector and four distinct antenna elements, offset from the reflector, each of the four distinct antenna elements following respective meandering patterns. Two antenna elements of the four antenna elements form a first dipole antenna along a first axis, and another two antenna elements of the four antenna elements form a second dipole antenna along a second axis perpendicular to the first axis. The near-field antenna further includes: (i) a power amplifier configured to feed electromagnetic signals to one of the dipole antennas, (ii) an impedance-adjusting component configured to adjust an impedance of one of the dipole antennas, and (iii) switch circuitry coupled to the power amplifier, the impedance-adjusting component, and the dipole antennas. The switch circuitry is configured to switchably couple the first dipole antenna to the power amplifier and the second dipole antenna to the impedance-adjusting component, and vice versa.

IPC Classes  ?

• H04B 5/00 - Near-field transmission systems, e.g. inductive or capacitive transmission systems

Abstract

Wireless charging systems and methods are disclosed herein. An example method includes: sending, by a receiver, a communication signal to a transmitter, the receiver being embedded in a radio frequency (RF) transparent housing that is adapted to electrically connect the game controller with the receiver, wherein: the receiver is separated from the transmitter by a non-zero distance, the RF transparent housing supports the game controller, and the communication signal includes information that allows the transmitter to determine the receiver's location. After the sending, the method includes: (A) receiving, by the receiver, RF signals from the transmitter, wherein: the transmitter determines parameters of the RF signals based on the communication signal, and at least one RF signal from the RF signals constructively interferences with at least one other RF signal from the RF signals at the receiver's location, and (B) converting, by the receiver, the received RF signals into electricity.

IPC Classes  ?

• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H05B 3/34 - Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs
• A61B 8/00 - Diagnosis using ultrasonic, sonic or infrasonic waves
• H02J 7/02 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
• B60L 55/00 - Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
• A61B 5/145 - Measuring characteristics of blood in vivo, e.g. gas concentration or pH-value

Abstract

An example method performed by a wireless-power-transmitting device that includes an antenna array is provided. The method includes radiating electromagnetic waves that form a maximum power level at a first distance away from the antenna array. Moreover, a power level of the radiated electromagnetic waves decreases, relative to the maximum power level, by at least a predefined amount at a predefined radial distance away from the maximum power level. In some embodiments, the method also includes detecting a location of a wireless-power-receiving device, whereby the location of the wireless-power-receiving device is further from the antenna array than a location of the maximum power level.

IPC Classes  ?

• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H01Q 1/24 - SupportsMounting means by structural association with other equipment or articles with receiving set
• H01Q 1/38 - Structural form of radiating elements, e.g. cone, spiral, umbrella formed by a conductive layer on an insulating support
• H01Q 5/378 - Combination of fed elements with parasitic elements
• H01Q 7/00 - Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
• H01Q 21/24 - Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
• H01Q 21/08 - Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along, or adjacent to, a rectilinear path

Abstract

An example method performed by a wireless-power-transmitting device that includes an antenna array is provided. The method includes radiating electromagnetic waves that form a maximum power level at a first distance away from the antenna array. Moreover, a power level of the radiated electromagnetic waves decreases, relative to the maximum power level, by at least a predefined amount at a predefined radial distance away from the maximum power level. In some embodiments, the method also includes detecting a location of a wireless-power-receiving device, whereby the location of the wireless-power-receiving device is further from the antenna array than a location of the maximum power level.

IPC Classes  ?

• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/90 - Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H01Q 21/29 - Combinations of different interacting antenna units for giving a desired directional characteristic
• H01Q 25/00 - Antennas or antenna systems providing at least two radiating patterns
• H02J 7/02 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
• H01Q 9/26 - Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength

Abstract

An example apparatus disclosed herein includes a controller; one or more receiving circuits coupled to the controller, each receiving circuit configured to receive incoming RF signals from a receiver, the receiver transmitting a communication signal that identifies a location of the receiver; a plurality of transmitting circuits coupled to the controller, each transmitting circuit configured to generate outgoing RF signals based upon the incoming RF signals; and a plurality of antenna elements, the plurality of antenna elements including at least some dedicated antenna elements. In some embodiments, the controller is configured to: (i) select a first configuration of at least some of the dedicated antenna elements to be coupled to the receiving circuits, and (ii) select, based on the location, a second configuration of at least some of the plurality of antenna elements to be coupled to the plurality of transmitting circuits to transmit the outgoing RF signals.

IPC Classes  ?

• H04B 5/00 - Near-field transmission systems, e.g. inductive or capacitive transmission systems
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/90 - Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Abstract

A wireless charging system comprises (i) a transmitter structure comprising a first metallic core disposed in an opening of the transmitter structure and (ii) a receiver structure comprising a second metallic core disposed in an opening of the receiver structure. The transmitter structure is configured to carry one or more radio frequency (RF) signals to the first metallic core when the receiver structure is within a threshold distance from the transmitter structure. In addition, the receiver structure is configured to be excited by the one or more RF signals from the transmitter structure, whereby the one or more RF signals are transferred from the first metallic core to the second metallic core when the transmitter structure and the receiver structure are within the threshold distance from each other.

IPC Classes  ?

• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02J 7/02 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
• H02J 50/10 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
• H02J 50/05 - Circuit arrangements or systems for wireless supply or distribution of electric power using capacitive coupling
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves

Abstract

An example wireless power transmitter includes: (i) a ground plate, (ii) a conductive wire offset from the ground plate, the conductive wire forming a loop antenna that is configured to radiate an RF signal for wirelessly powering a receiver device, (iii) a plurality of feed elements extending from the ground plate to the conductive wire, each feed element being connected to the conductive wire at a different position on the conductive wire, and (iv) a power amplifier connected to one or more feed elements of the plurality of feed elements. The power amplifier is configured to selectively feed the RF signal to a respective feed element of the one or more feed elements based on a location of the receiver device relative to the plurality of feed elements.

IPC Classes  ?

• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/23 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas
• G06K 19/07 - Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards with integrated circuit chips
• H02J 50/10 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
• H01Q 21/24 - Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
• H01Q 25/00 - Antennas or antenna systems providing at least two radiating patterns
• H01Q 3/40 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elementsArrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture varying the phase by electrical means with phasing matrix
• H01Q 7/00 - Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
• H01Q 21/28 - Combinations of substantially independent non-interacting antenna units or systems
• H01Q 21/06 - Arrays of individually energised antenna units similarly polarised and spaced apart
• H01Q 1/28 - Adaptation for use in or on aircraft, missiles, satellites, or balloons
• H02J 7/02 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
• H01Q 13/10 - Resonant slot antennas
• H01Q 15/00 - Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices

Abstract

An example wireless power transmitter includes: (i) a ground plate, (ii) a conductive wire offset from the ground plate, the conductive wire forming a loop antenna that is configured to radiate an RF signal for wirelessly powering a receiver device, (iii) a plurality of feed elements extending from the ground plate to the conductive wire, each feed element being connected to the conductive wire at a different position on the conductive wire, and (iv) a power amplifier connected to one or more feed elements of the plurality of feed elements. The power amplifier is configured to selectively feed the RF signal to a respective feed element of the one or more feed elements based on a location of the receiver device relative to the plurality of feed elements.

IPC Classes  ?

• H02J 50/23 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas
• H01Q 7/00 - Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
• H02J 7/02 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters