A calibration unit for calibrating a single cable interface operably coupling an SDU to an antenna includes a calibration loopback path operably coupled to a first path of the antenna and a second path of the antenna, a first path switch and a second path switch operably coupled to the first and second paths of the antenna, respectively, to alternately connect and disconnect the first and second paths of the antenna to the calibration loopback path where the first and second paths of the antenna are operably coupled to a first end of the single cable interface, a first detector operably coupled to a second path of the SDU among a first path of the SDU and the second path of the SDU that are each operably coupled to a second end of the single cable interface, the first detector being configured to detect a first signal at the second path of the SDU, an SDU DSP operably coupled to the first detector, a second detector operably coupled to the first path of the antenna to detect a second signal at the first path of the antenna, and an antenna DSP operably coupled to the second detector. The antenna DSP determines a first gain adjustment based on a test signal inserted at the first path of the SDU and the first signal and the second signal, and the SDU DSP determines a second gain adjustment based on the test signal, the first signal and the second signal.
A cross dipole antenna element may include a flexible substrate, a first pair of dipole arms disposed on the flexible substrate, a second pair of dipole arms disposed on the flexible substrate, a plurality of feed points disposed at a center portion of the flexible substrate and between the first and second pairs of dipole arms, a metallic plate forming a ground plane for the antenna element, and a dielectric spacer disposed between the center portion of the flexible substrate and the metallic plate. The first and second pairs of dipole arms may be operably coupled to the metallic plate at distal ends of the first and second pairs of dipole arms relative to the center portion.
H01Q 21/26 - Turnstile or like antennas comprising arrangements of three or more elongated elements disposed radially and symmetrically in a horizontal plane about a common centre
H01Q 1/28 - Adaptation for use in or on aircraft, missiles, satellites, or balloons
H01Q 1/42 - Housings not intimately mechanically associated with radiating elements, e.g. radome
An aviation antenna assembly may include a plurality of antenna elements, a directional control switch associated with each of the antenna elements to enable each of the antenna elements to transition between transmitting via a transmission via a transmit chain or receive via a receive chain, beam forming network elements disposed in the transmit chain and the receive chain, and an electronically controlled phased array stirring assembly operably coupled to the directional control switch of each of the antenna elements and to the beam forming network elements to perform electrical stirring with respect to signals in the transmit chain and the receive chain. The antenna elements, the directional control switch, the beam forming network elements, and the electronically controlled phased array stirring assembly of the antenna assembly are all disposed within a single radome attachable to an aircraft body.
H01Q 3/38 - 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 variable phase-shifters the phase-shifters being digital
An aviation antenna assembly may include a base portion for operably coupling the antenna assembly to an aircraft body, a support platform, and a plurality of antenna elements including a first antenna element, a second antenna element, a third antenna element, and a fourth antenna element. The support platform may be operably coupled to the base portion to support each of the first, second, third and fourth antenna elements uniformly distributed about a central axis. The support platform may support the first antenna element opposite the third antenna element relative to the central axis, and support the second antenna element opposite the fourth antenna element relative to the central axis. A line intersecting a center of the first and third antenna elements may form a 45° angle relative to a line of symmetry passing through the antenna assembly.
H01Q 1/28 - Adaptation for use in or on aircraft, missiles, satellites, or balloons
H01Q 3/34 - 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
A broad band dipole antenna includes a first top radiator which is a planar polygonal shaped surface arranged parallel to vertical axis of the broad band dipole antenna, a first bottom radiator which is a planar polygonal shaped surface arranged parallel to the first radiator and below of the first top radiator, a first coupler which is a planar polygonal shaped surface arranged in close proximity to both the first top radiator and the first bottom radiator, N−1 top radiators where each next top radiator is a copy of the previous top radiator which is rotated by approximately 360°/N around the vertical axis, where N is an integer greater than one, N−1 bottom radiators where each next bottom radiator is a copy of the previous bottom radiator which is rotated by approximately 360′/N around the vertical axis, N−1 couplers where each next coupler is a copy of the previous coupler which is rotated by approximately 360′/N around the vertical axis, a first jumper which connects bottom sides of all the top radiators, and a second jumper which connects top sides of all the bottom radiators.
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 1/52 - Means for reducing coupling between antennas Means for reducing coupling between an antenna and another structure
H01Q 1/38 - Structural form of radiating elements, e.g. cone, spiral, umbrella formed by a conductive layer on an insulating support
A broad band monopole antenna may include a planar electrically conductive base surface arranged horizontally, a planar polygonal shaped antenna element arranged vertically spaced above the base surface by a distance (D), and a planar polygonal shaped ground plane arranged vertically between the base surface and said antenna element. The ground plane may be electrically connected to the base surface.
A single cable interface for operably coupling a radio to an antenna may include a radio interface operably coupled to the radio, an antenna interface operably coupled to the antenna, and a single RF coaxial cable extending between the radio interface and the antenna interface. The radio interface and the antenna interface may each be configured to multiplex and de-multiplex multiple RF signals communicated from the radio to the antenna or from the antenna to the radio such that each of the multiple RF signals is communicated over the single RF coaxial cable. The multiple RF signals include a first RF signal and a second RF signal, the first and second RF signals having a same carrier frequency, phase and modulation type.
H04B 7/04 - Diversity systemsMulti-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
A compact dual-band air core helix antenna may include two sets of quadrifilar helix antenna elements with each of the antenna elements having different arm lengths. The helix antenna may be configured such that the antenna elements are printed on a foldable printed circuit board. Radiating elements of the antenna elements may be fed with four inputs and each of the four inputs may have a same amplitude and quadrature phase difference (e.g., 0, 90, 180, 270 degree phase shifts).
H01Q 1/36 - Structural form of radiating elements, e.g. cone, spiral, umbrella
H01Q 5/40 - Imbricated or interleaved structuresCombined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
9.
Dual KA band compact high efficiency CP antenna cluster with dual band compact diplexer-polarizers for aeronautical satellite communications
The present invention is a dual Ka-band, compact, high efficiency CP antenna cluster with dual band compact diplexers-polarizers that can be used as a basic building block for mobile satellite antenna arrays that require minimal dimensions and high efficiency.
H01Q 13/00 - Waveguide horns or mouths Slot antennas Leaky-waveguide antennas Equivalent structures causing radiation along the transmission path of a guided wave
H01Q 5/55 - Feeding or matching arrangements for broad-band or multi-band operation for horn or waveguide antennas
H01Q 1/36 - Structural form of radiating elements, e.g. cone, spiral, umbrella
H01Q 1/28 - Adaptation for use in or on aircraft, missiles, satellites, or balloons
10.
Dual KA band compact high efficiency CP antenna cluster with dual band compact diplexer-polarizers for aeronautical satellite communications
The present invention is a dual Ka-band, compact, high efficiency CP antenna cluster with dual band compact diplexers-polarizers that can be used as a basic building block for mobile satellite antenna arrays that require minimal dimensions and high efficiency.
H01Q 13/00 - Waveguide horns or mouths Slot antennas Leaky-waveguide antennas Equivalent structures causing radiation along the transmission path of a guided wave
H01Q 5/55 - Feeding or matching arrangements for broad-band or multi-band operation for horn or waveguide antennas
H01Q 1/28 - Adaptation for use in or on aircraft, missiles, satellites, or balloons
H01Q 1/36 - Structural form of radiating elements, e.g. cone, spiral, umbrella
The present invention is an octofilar antenna formed by adding four grounded parasitic arms in between the arms of a conventional air core quadrifilar antenna to negate the problems of mis-matching and strong mutual coupling for quarter-wave small helices. The invention ultra compact air core helix antenna does not suffer from typical dielectric loading effects.
An antenna assembly may include a right hand circularly polarized (RHCP) antenna, a left hand circularly polarized (LHCP) antenna, an RF nuller operably coupling the RHCP antenna and LHCP antenna to a difference element, and a digital nuller operably coupled to the difference element.
H01Q 3/26 - 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
H01Q 1/28 - Adaptation for use in or on aircraft, missiles, satellites, or balloons
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
13.
Omni directional space-fed antenna with loop patterns
The present invention antenna preserves the general size and form factor of the prior art loop antennas while providing the benefits of multiple point feeds at less than one wavelength in separation of feed points. The invention antenna obtains omnidirectional radiation and improved efficiency over the prior art by way of dual slotted, open ended cylindrical or rectangular box structures fed with high impedance feed lines.
patents
