A vehicle antenna device includes a plate-like element and a ground substrate. The plate-like element has a feed part and a leading end part extending a predetermined line width from the feed part to the leading end part to define a blank part at its center as viewed from above. The plate-like element has an open part extending from the blank part between the feed part and the leading end to transmit and receive signals of a predetermined frequency band. The ground substrate has a ground part serving as a ground of the plate-like element and a feed point connected with the feed part of the plate-like element and is disposed such that a large part of the ground part does not overlap the plate-like element as viewed from above and does not run off the range defined by the blank part and the open part.
A MIMO antenna device includes a front-side dipole antenna and a back-side dipole antenna. Long-side feed parts for hot element are connected respectively to feed points at their long sides. Long-side feed parts for ground element are connected respectively to the feed points at their long sides, and the long sides thereof face the long sides of the long-side feed parts for hot element in parallel with a predetermined interval. Ground elements are respectively arranged point-symmetric to hot elements with respect to the feed points in an offset manner. The front-side dipole antenna and the back-side dipole antenna are arranged such that the front-side feed point and the back-side feed point substantially overlap each other in a top view and that the long-side feed part for front-side is arranged perpendicular to the long-side feed part for back-side.
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 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
A composite antenna includes a dipole antenna element and a circularly polarized antenna element. The dipole antenna element includes a first hot terminal, a ground terminal, a first element extending from the first hot terminal, and a second element extending from the ground terminal. The circularly polarized antenna element includes a second hot terminal disposed on a line connecting the first hot terminal and the ground terminal so as to be sandwiched therebetween, a third element extending from the second hot terminal, and a fourth element extending from the ground terminal perpendicularly with respect to the third element.
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
A low-profile composite antenna device includes a base plate, a first antenna, and a second antenna. The first antenna has a patch electrode capable of receiving signals in a first frequency band. The second antenna, which is capable of receiving signals in a second frequency band, has a top load part as a capacitive element. The top load part is disposed near the patch electrode of the first antenna such that it does not cover the patch electrode in a top view and that the patch electrode is located on the longitudinal extension axis of the top load part. The second antenna has at least one stub that electrically divides the longitudinal direction of the top load part into front and rear sections so as to function as a waveguide for the first antenna.
To provide a small-sized half-wavelength antenna device capable of adjusting directivity. A half-wavelength antenna device for a vehicle includes: a conductive plate 10; a half-wavelength element 20; and a parasitic element 30. The conductive plate 10 has a feeding part 11 and a ground 12. The half-wavelength element 20 is vertically installed on the conductive plate 10 so as to be connected to the feeding part 11 but insulated from the ground 12. The parasitic element 30 is disposed in proximity and parallel to the half-wavelength element 20 so as to be electromagnetically coupled thereto but insulated from the ground 12.
H01Q 9/40 - Element having extended radiating surface
H01Q 19/26 - Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of a single substantially straight conductive element the primary active element being end-fed and elongated
H01Q 21/30 - Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
Provided is a compact, thin composite patch antenna device compatible with a plurality of frequency bands. The composite patch antenna device comprises a ground plate 10, a dielectric 20, a first patch element 30, a second patch element 40, and a filter portion 50. The first patch element 30 is disposed on the dielectric 20, includes a power supply portion 31, and corresponds to a first frequency band. The second patch element 40 is formed within the first patch element 30 and is separated from the first patch element 30 by a slit 41 of a predetermined width, shares the power supply portion 31 of the first patch element 30, and corresponds to a second frequency band higher than the first frequency band. The filter portion 50 is connected between the first patch element 30 and the second patch element 40, attenuates signals in the second frequency band, and passes signals in the first frequency band.
Provided is a composite planar antenna device capable of handling a plurality of frequency bands with little deterioration of antenna characteristics even in a limited space. The composite planar antenna device comprises a first power supply unit 10, a second power supply unit 20, a first planar element 30, a second planar element 40, and a filter unit 50. The first planar element 30 is disposed facing a ground conductor surface 1 from above, and can handle a first frequency band. The second planar element 40 is disposed on the same plane as the first planar element 30 so as to face the ground conductor surface from above, is disposed across a gap G of a predetermined width with respect to an edge portion in the longitudinal direction of the first planar element 30, and can handle a second frequency band by being used together with the first planar element 30. The filter unit 50 is connected in the gap G between the first planar element 30 and the second planar element 40, attenuates signals in the first frequency band, and passes signals in the second frequency band.
H01Q 5/321 - Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors within a radiating element or between connected radiating elements
H01Q 1/32 - Adaptation for use in or on road or rail vehicles
A low-profile composite antenna device for vehicles includes a base plate, a circuit board, an antenna cover, a first element and a second element. The antenna cover has a ridgeline part whose longitudinal direction faces the vehicle traveling direction and a side surface part extending from both sides of the ridgeline part. The first element is arranged at the left side in the vehicle traveling direction, is inclined with respect to the base plate as viewed from the front side in the vehicle traveling direction and the upper end side thereof is arranged in a vicinity of the ridgeline part. The second element is arranged at the right side in the vehicle traveling direction, the upper end side thereof is arranged in the vicinity of the ridgeline part with a gap, and faces the first element from the ridgeline part toward the base plate.
Provided is a vehicular antenna device in which inadvertent force due to thermal stress is not applied to a circuit board on an antenna base and which places few restrictions on the layout of the circuit board. This vehicular antenna device comprises an antenna base 10, an antenna case 20, an antenna element 30, and a circuit board 40. The antenna base 10 comprises a resin base 11 and a conductive base 12. The antenna element 30 has a power supply unit 31. The circuit board 40 has connected thereto the power supply unit 31 of the antenna element 30, extends over the conductive base 12 of the antenna base 10, is fixed to the conductive base 12, and further extends over the resin base 11. When the antenna base 10 is fixed to the antenna case 20, the circuit board 40 is fixed by having at least a portion of the circuit board 40 extending over the resin base 11, sandwiched between the resin base 11 and the antenna case 20.
A low-profile antenna device includes a base plate, a top load element, and an antenna cover. The top load element has a ridge line part, a side surface part, and a slit. The ridge line part extends in the longitudinal direction of the top load element so as to be inclined with respect to the base plate. The slit extends from one side surface part to the middle of the other side surface part so as to pass through the ridge line part to divide the ridge line part into a front side part and a rear side part. The top load element is folded such that the ridge line part is changed in height at the slit so as to bring the ridge line part close to the topmost position inside the antenna cover.
Provided is an electronic circuit unit that can be replaced without restrictions on the diameter of the tip of a screwdriver and without breaking a case, while preventing a screw that fastens a circuit board and a base plate together from falling out. The electronic circuit unit comprises a Sems screw 10, a circuit board 20, a case 30, an anti-unscrewing rib 40, and a base plate 50. The case 30 covering the circuit board 20 has a counterbore hole 31 larger than the diameter of a screw head 11 of the Sems screw 10 and deeper than the height of the screw head 11. The anti-unscrewing rib 40 has an inner diameter smaller than the diameter of a washer 13 of the Sems screw 10 and larger than the diameter of the screw head 11, and is disposed at a height such that the Sems screw 10 stops at a position where the screw tip of the Sems screw 10 does not come out from a through hole 22 of the circuit board 20. The base plate 50 has a female screw 51 to which the Sems screw 10 is fastened.
Provided is a housing structure for a vehicular antenna, the housing structure having a high degree of design flexibility in the installation positions of screw bosses, and having strong screw bosses. This housing structure for a vehicular antenna comprises: a first housing 10, a second housing 20, through-holes 30, screw bosses 40, and twist-limiting fitting parts 50. The second housing 20 has a side wall 21 that abuts on the first housing 10, and demarcates an internal space together with the first housing 10. The through-holes 30 are disposed in the first housing 10, and fastening screws penetrate therethrough. The screw bosses 40 are disposed in the second housing 20, and the fastening screws are screwed thereinto coaxially with the through-holes 30. The twist-limiting fitting parts 50 are each disposed at a position where the through-hole 30 and the screw boss 40 abut on each other, and fitted so as to limit the twist of the screw boss 40 due to screwing-in of the fastening screw.
A vehicle body-embedded antenna device basically includes a plate-like antenna element, a circuit board and a fixed conductive part. The plate-like antenna element is disposed inside the bathtub-shaped part at the highest possible level therein so as to be substantially parallel to the metal body surface. The circuit board is disposed inside the bathtub-shaped part so as not to overlap the plate-like antenna element as viewed from above. The circuit board has a feeding part connected with the plate-like antenna element. The fixed conductive part is electrically conductive to both the circuit board and the bathtub-shaped part. The fixed conductive part is fixed to a bottom part of the bathtub-shaped part through an attachment hole formed in the bottom part of the bathtub-shaped part.
An antenna module (1) according to the present invention comprises: a circuit board (30) that is a conductive member; an antenna element (10) that is disposed on the circuit board (30); and a holder (20) that is disposed between the circuit board (30) and the antenna element (10). The antenna element (10) has a top plate (11), an electrostatic capacitance part (12) that forms electrostatic capacitance with the circuit board (30), and a connection part (13) that connects the top plate (11) and the electrostatic capacitance part (12). The holder (20) has a base part (21) that is disposed between the electrostatic capacitance part (12) and the circuit board (30). When the holder (20) is rotated, the circuit board (30) and the antenna element (10) are fixed with the base part (21) therebetween. Thus, the antenna module can suppress an increase in number of components and antenna performance deterioration caused by distortion of the antenna element, and can exhibit high assemblability during manufacturing of an antenna device.
A vehicle antenna device is configured to provide effective noise shielding, and to have a reduced thickness. The vehicle antenna device includes a first element and a second element. The first element functions as a capacitive antenna and supports a first frequency band. The second element functions as a resonant antenna and is disposed at a position capable of shielding noise from a noise source to the first element and shields the noise. The second element supports a second frequency band higher than the first frequency band. An attenuator circuit attenuating a signal of the first frequency band may be connected to the second element.
Provided is a MIMO antenna device with which interference between antennas is suppressed over wide bands and which can be reduced in size. The MIMO antenna device is composed of a front dipole antenna 10 and a back dipole antenna 20. Long-side feeding units 12, 22 for hot elements are connected to feeding points 11, 21 at long sides. Long-side feeding units 14, 24 for ground elements are connected to the feeding points 11, 21 at long sides, and face the long-side feeding units 12, 22 for hot elements in parallel with the long sides thereof at a predetermined distance. Ground elements 15, 25 are arranged point-symmetrically about the feeding points 11, 12 in an offset manner, with respect to hot elements 13, 23. Further, the front dipole antenna 10 and the back dipole antenna 20 are, in a top view, arranged such that the feeding points 11, 21 are substantially overlapped, and such that the long-side feeding units on the front are orthogonal to the long-side feeding units on the back.
H01Q 21/28 - Combinations of substantially independent non-interacting antenna units or systems
H01Q 9/16 - Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
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
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 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
Provided is a composite antenna device which prevents a decrease in radiation efficiency due to the generation of a reverse current, has good antenna characteristics, and is easy to power. The composite antenna device includes a dipole antenna element 10 and a circularly polarized antenna element 20. The dipole antenna element 10 includes a first hot terminal 11, a ground terminal 12, a first element 13 extending from the first hot terminal 11, and a second element 14 extending from the ground terminal 12. The circularly polarized antenna element 20 includes a second hot terminal 21 which is disposed on a straight line connecting the first hot terminal 11 and the ground terminal 12 so as to be interposed between the first hot terminal 11 and the ground terminal 12, a third element 22 extending from the second hot terminal 21, and a fourth element 23 extending from the ground terminal 12 in a direction perpendicular to the third element 22.
H01Q 1/22 - SupportsMounting means by structural association with other equipment or articles
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
Provided is a low-profile composite antenna device with which the antenna reception characteristics of a patch antenna are improved, even in a low-profile housing that is restricted in the height direction. A low-profile composite antenna device comprises a base plate 10, a first antenna 20, and a second antenna 30. The first antenna 20 has a patch electrode 21 able to receive a signal of a first frequency band. The second antenna 30, which is able to receive a signal of a second frequency band, has a top load section 31 that is a capacitive element. The top load section 31: is arranged near the patch electrode 21 so that the patch electrode 21 of the first antenna 20 is not covered in plan view and is located on an axis of extension of the longitudinal direction of the top load section 31; and also has at least one stub 32 electrically dividing the longitudinal direction of the top load section 31 into front and back so as to also function as a wave director of the first antenna 20.
H01Q 1/32 - Adaptation for use in or on road or rail vehicles
H01Q 1/22 - SupportsMounting means by structural association with other equipment or articles
H01Q 9/36 - Vertical arrangement of element with top loading
H01Q 13/08 - Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
H01Q 19/02 - Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic Details
Provided is a vehicle antenna device which is easy to manufacture, with can be made broadband, and with which the antenna transmission/reception characteristics can be easily adjusted. The vehicle antenna device comprises: a plate-shaped element 10; and a ground substrate 20. The plate-shaped element 10 includes a power feeding part 11 and a distal end part 12, and also includes an opened section 14 that extends with a prescribed line width from the power feeding part 11 to the distal end 12 so that a blank section 13 is provided at the center in top view, and that extends from the blank section 13 between the feeding part 11 and the distal end part 12. The plate-shaped element is capable of transmitting/receiving signals of a prescribed frequency band. The ground substrate 20 includes a ground part 21 which serves as a ground of the plate-shaped element 10, and a power feeding point 22 to which the power feeding part 11 of the plate-shaped element 10 is connected. The ground substrate is disposed at a position at which a majority of the ground part 21 does not overlap with the plate-shaped element 10 in top view and the ground substrate does not protrude out from the range of the blank section 13 and the opened section 14.
H01Q 1/32 - Adaptation for use in or on road or rail vehicles
H01Q 9/40 - Element having extended radiating surface
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 21/28 - Combinations of substantially independent non-interacting antenna units or systems
The present invention provides a low-profile composite antenna device which enables a reduction in size while retaining antenna transmission/reception properties. A low-profile composite antenna device for vehicles comprises a base plate 10, a circuit board 20, an antenna cover 30, a first element 40, and a second element 50. The antenna cover 30 has a ridge part 31, the lengthwise direction of which is oriented in the vehicle advancing direction, and side surface parts 32 which extend from both sides of the ridge part 31. The first element 40 is disposed on the left side with respect to the vehicle advancing direction and is disposed so as to be inclined with respect to the base plate 10 in a frontal view from the vehicle advancing direction. The top side 41 thereof is disposed in the vicinity of the ridge part 31. The second element 50 is disposed on the right side with respect to the vehicle advancing direction. The top side 51 thereof is disposed in the vicinity of the ridge part 31 with a gap between the top side 51 and the first element 40. The second element 50 is disposed oppositely from the first element 40, from the ridge part 31 toward the base plate 10.
H01Q 1/32 - Adaptation for use in or on road or rail vehicles
H01Q 1/22 - SupportsMounting means by structural association with other equipment or articles
H01Q 5/335 - Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors at the feed, e.g. for impedance matching
H01Q 21/28 - Combinations of substantially independent non-interacting antenna units or systems
A roof-mount antenna mounting structure includes a first threaded part, a second threaded part, a legged washer, a leg opening preventing part and a receiving part. The legged washer has a washer ring having a size smaller than the diameter of a mounting hole of a vehicle roof and a leg part extending from the washer ring and having a plurality of claws that can abut against the vehicle roof. The leg part has such elasticity that it closes once when the legged washer is inserted into the mounting hole of the vehicle roof from the washer ring side and recovers to substantially the original opening state after insertion. The leg opening preventing part has a horizontal part and a vertical part and prevents the leg part from opening at a predetermined angle or more when the claws abut against the vehicle roof.
Provided is a small-sized half-wavelength antenna device the directionality of which can be adjusted. The half-wavelength antenna device for vehicles comprises an electroconductive plate 10, a half-wavelength element 20, and a passive element 30. The electroconductive plate 10 has a feed unit 11 and a ground 12. The half-wavelength element 20 is erected on the electroconductive plate 10, connected to the feed unit 11, and insulated from the ground 12. The passive element 30 is disposed in proximity to and parallel to the half-wavelength element 20 so as to be electromagnetically coupled to the half-wavelength element 20, and is insulated from the ground 12.
H01Q 1/22 - SupportsMounting means by structural association with other equipment or articles
H01Q 1/32 - Adaptation for use in or on road or rail vehicles
H01Q 9/40 - Element having extended radiating surface
H01Q 19/26 - Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of a single substantially straight conductive element the primary active element being end-fed and elongated
H01Q 21/30 - Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
Provided is a low-profile antenna device that has no problem with antenna reception characteristic, is easy to manufacture, cost-effective, and has less manufacturing errors. This low-profile antenna device comprises a base plate 10, a top-loaded element 20, and an antenna cover 30. The top-loaded element 20 has a ridge part 21, side surface parts 22, and a slit 23. The ridge part 21 extends in the longitudinal direction of the top-loaded element 20 and inclines relative to the base plate 10. The slit 23 extends from one side surface part 22a through the ridge part 21 to some point of the other side surface part 22b and divides the ridge part 22 into front and back parts. In order to cause the ridge part 21 to be close to the highest position of the inner side of the antenna cover 30, the top-loaded element 20 is bent into a curved shape such that the height of the ridge part 21 changes across the slit 23.
H01Q 9/36 - Vertical arrangement of element with top loading
B60R 11/02 - Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the likeArrangement of controls thereof
H01Q 1/22 - SupportsMounting means by structural association with other equipment or articles
H01Q 1/32 - Adaptation for use in or on road or rail vehicles
The present invention provides a vehicle body-embedded antenna device that can be embedded in a portion depressed in a metal body of a vehicle. This vehicle body-embedded antenna device comprises a planar antenna element 10, a circuit substrate 20, and a fixed conducting part 30. The planar antenna element 10 is disposed substantially parallel to the metal body surface at the highest possible level where the planar antenna element can be disposed in the interior of a bathtub-shaped part 1. The circuit substrate 20 is disposed in the interior of the bathtub-shaped part 1 so as not to overlap the planar antenna element 10 in a top view, and has a power feeding part 21 to which the planar antenna element 10 is connected. The fixed conducting part 30 is electrically conductive to the circuit substrate 20 and also electrically conductive to the bathtub-shaped part 1, and is fixed to the bottom of the bathtub-shaped part 1 via a mounting hole 2 at the bottom of the bathtub-shaped part 1.
B60R 11/02 - Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the likeArrangement of controls thereof
H01Q 1/22 - SupportsMounting means by structural association with other equipment or articles
H01Q 1/32 - Adaptation for use in or on road or rail vehicles
26.
Power feed circuit comprising a synthesizing-distributing unit and a phase shifting unit configured for feeding a two point or a four point circularly polarized antenna
A power feed circuit for a circularly polarized antenna includes a synthesizing-distributing unit and a phase shift unit. The synthesizing-distributing unit distributes input signals to two paths with the same phase and same amplitude. The phase shift unit has two phase shift circuits connected respectively between the two paths distributed by the synthesizing-distributing unit and two feed points of a circularly polarized antenna. The phase shift unit outputs signals whose phase difference is 90° to the two feed points and of the circularly polarized antenna.
This antenna mounting structure is for mounting an antenna on an outer panel of a vehicle. The antenna mounting structure comprises a metal base plate, and a reinforcing plate having electrical conductivity. The base plate has a back surface facing the outer panel, and a main surface opposite to the back surface. The base plate has an opening penetrating through the main surface to the back surface. An antenna is disposed on the upper side of the main surface of the base plate. The reinforcing plate is disposed on the main surface so as to extend across the opening of the base plate. The reinforcing plate is in contact with the main surface and extends along the main surface. The reinforcing plate is attracted to the outer panel via a coupling member that is inserted into the opening and that extends in the thickness direction of the base plate. The base plate and the reinforcing plate have a rotation-preventing structure for preventing relative rotation thereof.
H01Q 1/22 - SupportsMounting means by structural association with other equipment or articles
B60R 11/02 - Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the likeArrangement of controls thereof
F16B 5/07 - Joining sheets or plates to one another or to strips or bars parallel to them by means of multiple interengaging protrusions on the surfaces, e.g. hooks, coils
An antenna device 1 comprises: a circuit board 12 having a ground region; a first antenna element 18a that has the base end-side connected to a first power feed point provided to the circuit board 12 and that forms a first monopole antenna; a second antenna element 18b that has the base end-side connected to a second power feed point provided to the circuit board 12 and that forms a second monopole antenna; and a connection part 20 connecting the distal end part of the first antenna element 18a and the distal end part of the second antenna element 18b.
Provided is a circularly polarized antenna device that is inexpensive, and that can achieve downsizing and weight saving. This circularly polarized antenna device comprises a circuit board 10, a circularly polarized antenna 20, and a series power feed circuit 30. The circularly polarized antenna 20 includes four linearly polarized antenna elements 21 to 24 erected on the circuit board 10 and respectively connected to feeding points 11 to 14, and is configured to be able to receive circularly polarized waves. The series power feed circuit 30 for feeding power to each feeding point in series has transmission lines 31 to 33 and an impedance converter 34. The transmission lines and the impedance converter each have a characteristic impedance that is adjusted so that received signal amplitudes of the linearly polarized antenna elements are substantially equal, and the line length of each transmission line is configured so that phase differences between the linearly polarized antenna elements are substantially equal.
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
H01P 5/08 - Coupling devices of the waveguide type for linking lines or devices of different kinds
A composite antenna device 100 comprises: a rectangular planar substrate 152; a patch antenna 130 installed at the center of the planar substrate 152; a TEL element 120A operating in a frequency band different from a frequency band in which the patch antenna 130 operates; and a TEL element 120B operating in substantially the same frequency band as the frequency band in which the TEL element 120A operates. The TEL element 120A includes a radiating plate extending along a first side 160 of the planar substrate 152, bent at an end of the first side 160, and extending along a second side 162 adjacent to the first side 160. The TEL element 120B includes a radiating plate extending along a third side 164 opposing the first side 160, bent at an end of the third side 164, and extending along a fourth side 166 opposing the second side 162.
A vehicle exterior device includes: a base member; a cover attached to the base member in a watertight manner, the cover and the base member forming a housing space therebetween, the cover having at least one opening; a functional unit including a holder located on the base member in the housing space, and a functional component supported by the holder with a leading end thereof being exposed through the opening; and a sealing portion located around the opening between an outer face of the functional unit and an inner face of the cover.
A noise reduction device includes: a combiner to shift a phase of one of a first signal propagating through a first propagation path and a second signal propagating through a second propagation path by a predetermined angle and combine the phase-shifted one signal of the first signal and the second signal with the other signal of the first signal and the second signal; and a phase difference absorption circuit having a phase shift characteristic that reduces a difference between a phase difference between two signals each having a lower limit frequency of a band of the broadcast wave and passing through the first propagation path and the second propagation path and a phase difference between two signals each having an upper limit frequency of the band of the broadcast wave and passing through the first propagation path and the second propagation path.
Provided is a retractable roof-mounted antenna device that has a low number of components and that is not susceptible to defects associated with a click mechanism. This retractable roof-mounted antenna device for a vehicle comprises a joint assembly 10, a base assembly 20, a click plate 30, an elastic member 40, and an axial bolt 50. In the joint assembly 10, a first terminal 11 having a first click structure 12 is securely positioned. In the base assembly 20, a second terminal 23 is securely positioned on a pivot support part. The click plate 30 has a second click structure 31 for fitting to the first click structure 12 and imparting a clicking sensation, the second click structure 31 being in slidable contact with the first terminal 11. The elastic member 40 imparts urging force to the click plate 30. The first terminal 11 is passed axially through the first axial bolt 50 in a state that allows axial rotation, and the click plate 30 is passed axially through the first axial bolt 50 in a state that allows movement along the axis while disallowing axial rotation.
H01Q 1/22 - SupportsMounting means by structural association with other equipment or articles
B60R 11/02 - Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the likeArrangement of controls thereof
An antenna device for a vehicle includes an antenna element having a first main surface, a shielding plate having a second main surface facing the first main surface and wider than the first main surface, the shielding plate being located between the antenna element and a noise source in the vehicle, and an insulating member located between the first main surface and the second main surface to integrate the antenna element and the shielding plate.
Provided is a roof-mounted antenna mounting structure which is lightweight, can be configured inexpensively, and can be mounted with a less force when fastening. The roof-mounted antenna mounting structure comprises a first threaded part 10, a second threaded part 20, a legged washer 30, leg spreading prevention parts 40, and a receiving part 50. The legged washer 30 includes a washer ring 31 smaller than the diameter of a mounting hole 3 of a vehicle roof 2, and leg parts 32 which extend from the washer ring 31 and on which are formed a plurality of claw parts 33 that may abut against the vehicle roof 2. The leg parts 32 are elastic so as to close temporarily when the legged washer 30 is inserted into the mounting hole 3 of the vehicle roof 2 from the washer ring 31 side, and reopen substantially to the original state after the insertion. The leg spreading prevention part 40 includes a horizontal part 41 and a vertical part 42 cut out from the leg part 32 in a vicinity of a portion between the plurality of claw parts 33, and prevents the leg parts 32 from opening a predetermined amount or more when the claw parts 33 abut against the vehicle roof 2.
B60R 11/02 - Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the likeArrangement of controls thereof
H01Q 1/22 - SupportsMounting means by structural association with other equipment or articles
H01Q 1/32 - Adaptation for use in or on road or rail vehicles
Provided is a vehicle-mounted antenna device that has a noise blocking effect and that can also be reduced in thickness. The vehicle-mounted antenna device installed on a vehicle comprises a first element 10 and a second element 20. The first element 10 is a capacitive antenna corresponding to a first frequency band. The second element 20 is a resonant antenna that is disposed at a position at which the second element 20 blocks noise from a noise generation source to the first element 10, that blocks noise, and that corresponds to a second frequency band higher than the first frequency band. An attenuation circuit 21 for attenuating a signal in the first frequency band may be connected to the second element.
An antenna device includes an antenna base having a longitudinal direction, a first antenna element on the antenna base, and a pair of second antenna elements on the antenna base, the pair of second antenna elements being capable of transmitting and receiving radio waves in a higher frequency band than the first antenna element. In a planar view, when the antenna base is divided into four regions by a first line segment along the longitudinal direction and a second line segment orthogonal to the first line segment intersecting each other at the center point of the first antenna element, a region where one of the pair of second antenna elements is located is not adjacent to a region where the other of the pair of second antenna elements is located.
Provided is a power feeder circuit for a circularly polarized antenna, the power feeder circuit stabilizing, over a wide band, a phase difference between two paths for feeding power to two power feeding points of a circularly polarized antenna, and also having a small amplitude ratio over a wide band. The power feeder circuit for a circularly polarized antenna comprises a synthesizing/distributing unit 10 and a phase shift unit 20. The synthesizing/distributing unit 10 distributes input signals with the same phase and same amplitude to the two paths. The phase shift unit 20 has two phase shift circuits 21, 22 connected respectively between the two paths for distribution by the synthesizing/distributing unit 10 and two power feeding points P2, P3 of a circularly polarized antenna 1. The phase shift unit 20 outputs, to the two power feeding points P2, P3 of the circularly polarized antenna 1, signals for which the phase difference becomes 90 degrees.
Provided is a compact MIMO antenna device capable of suppressing interference between antennas in wide bands. A MIMO antenna device for performing spatial multiplex transmission comprises a first dipole antenna 10 and a second dipole antenna 20. The first dipole antenna 10 comprises a pair of first elements 11 connected to a first feed unit 13 and disposed on a first surface 12. The second dipole antenna 20 comprises a pair of second elements 21 connected to a second feed unit 23 and disposed on a second surface 22 opposing the first surface 12. The second dipole antenna 20 is disposed across the first dipole antenna 10 in a top view, with the second feed unit 23 generally overlapping the first feed unit 13 and without major parts of the pair of second elements 21 overlapping major parts of the pair of first elements 11.
H01Q 1/52 - Means for reducing coupling between antennas Means for reducing coupling between an antenna and another structure
H01Q 9/16 - Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
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
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 21/28 - Combinations of substantially independent non-interacting antenna units or systems
An antenna device is provided for a vehicle. The antenna device includes a substrate, an antenna element and a capacitor part. The substrate includes a pair of main surfaces which face opposite sides each other. The antenna element includes a metal plate part which is disposed over and separated from one of the main surfaces, and a metal leg part which extends from the metal plate part toward the substrate. The capacitor part is electrically connected to the metal plate part through the metal leg part and includes two or more capacitors connected in series.
A vehicle antenna device includes an antenna element, a circuit board, a coil, an amplifier circuit and a fixing portion. The antenna element functions as a capacitive antenna supporting a first frequency band. The circuit board has a power feeding portion that is connected to a power feeding line of the antenna element. The coil is electrically connected to the power feeding portion so that the antenna element has an antenna length supporting a second frequency band. The fixing portion and the antenna element are formed at an edge of the antenna element in order to fix the circuit board to the antenna element at a location close to the position of the coil and far from a position of the amplifier circuit. The fixing portion is provided with a predetermined gap from the coil that is large enough to avoid the influence of coupling with the coil.
H01Q 1/32 - Adaptation for use in or on road or rail vehicles
H01Q 9/40 - Element having extended radiating surface
H01Q 5/314 - Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
A vehicle exterior device 1 comprises: a base member 10; a cover 12 attached to the base member 10 in a watertight manner so as to form an accommodation space S therebetween, and having at least one opening 16; a functional unit 28 including a holder 50 disposed on the base member 10 in the accommodation space S, and a functional component 20 supported by the holder 50 in such a way that a front end thereof is exposed to the opening 16; and a sealing part 56 interposed, around the opening 16, between an outer surface of the functional unit 28 and an inner surface of the cover 12.
B60R 1/00 - Optical viewing arrangementsReal-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
B60R 11/02 - Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the likeArrangement of controls thereof
F16J 15/10 - Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
H01Q 1/22 - SupportsMounting means by structural association with other equipment or articles
A patch antenna device configured to receive a radio communication signal includes a circuit board, a patch antenna, and a parasitic element. The circuit board has a signal processing circuit placed thereon. The patch antenna is stacked on the circuit board and has a quadrangular radiation element. The parasitic element is disposed above the patch antenna so as to improve antenna gain characteristics of the patch antenna and configured such that the length of the upper side of the parasitic element is shorter than the width in a plan view of the radiation element of the patch antenna and that the length between the upper and lower sides of the parasitic element is longer than the length between the upper and lower sides of the radiation element of the patch antenna.
H01Q 5/378 - Combination of fed elements with parasitic elements
H01Q 19/00 - Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
An antenna module configured to receive a radio communication signal includes: a circuit board on which a signal processing circuit is placed; a patch antenna stacked on the circuit board; a parasitic element disposed above the patch antenna, having held portions having at least two sides opposed to each other, and configured to improve elevation angle reception characteristics of the patch antenna; an integrated resin holder supporting the circuit board and the parasitic element, having at least a pair of parasitic element locking pawls that sandwich and support the two sides of the held portions of the parasitic element from both sides such that the distance between the patch antenna and the parasitic element is kept constant.
H01Q 1/22 - SupportsMounting means by structural association with other equipment or articles
H01Q 19/00 - Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
H01Q 5/307 - Individual or coupled radiating elements, each element being fed in an unspecified way
A stacked patch antenna includes a circuit board, a first patch antenna, a second patch antenna, and a parasitic element. The first patch antenna is stacked on the circuit board, has a first power feeding line and a first radiation element, and receives signals in a first frequency band. The second patch antenna is stacked on the first patch antenna 20 has a second power feeding line longer than the first power feeding line and penetrating the first radiation element to be connected to a second power feeding portion and a second radiation element smaller in size than the first radiation element, and receives signals in a second frequency band higher than the first frequency band. The parasitic element is a plate-like element disposed above the second patch antenna so as to improve elevation angle reception characteristics of the second patch antenna.
To provide a cable connection structure used in a vehicle antenna device, capable of being reduced in size, easy to assemble, and having required tensile strength. The cable connection structure includes a connection terminal 10, a circuit board 20, a base plate 30, a positioning abutting part 40, and a cable clamp 50. The connection terminal 10 is attached to a braided wire 3 of a coaxial cable 1. The circuit board 20 has a signal line connection hole 21 and a ground line connection hole 22. The base plate 30 has a cable insertion hole 31. The positioning abutting part 40 is used for determining the position of the circuit board 20 on the base plate 30. The cable clamp 50 grasps a protective outer cover 4 of the coaxial cable 1, holds a core wire 2 such that the core wire 2 is exposed at a predetermined height position, and holds a connection terminal 10 such that the connection terminal 10 is exposed at a predetermined height position.
An antenna device according to one embodiment comprises: an antenna element provided along a first flat surface; a shielding member that is provided between the antenna element and a noise generating source of a vehicle and that is disposed so as to be separated from the antenna element, at least a part of the shielding member being provided along a second flat surface facing the first flat surface; and an insulating member that is made of an insulating material and connects the antenna element and the shielding member. A part of the antenna element and at least a part of the shielding member are disposed so as to overlap each other as seen from the direction in which the first flat surface and the second flat surface face each other.
B60R 11/02 - Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the likeArrangement of controls thereof
H01Q 1/22 - SupportsMounting means by structural association with other equipment or articles
H01Q 1/32 - Adaptation for use in or on road or rail vehicles
H01Q 1/52 - Means for reducing coupling between antennas Means for reducing coupling between an antenna and another structure
H01Q 21/30 - Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
This noise reduction device of one aspect is provided with: a synthesizer which shifts, by a prescribed angle, the phase of one among a first signal propagated through a first propagation path and a second signal propagated through a second propagation path, and synthesizes the phase-shifted signal and the other signal among the first signal and the second signal; and a phase difference absorption circuit which is provided between a first antenna and the synthesizer, or a second antenna and the synthesizer. The phase difference absorption circuit has phase shift characteristics that make small the difference between a phase difference between two signals that have a lower limit frequency in a broadcast wave band and respectively pass through the first propagation path and the second propagation path, and a phase difference between two signals which have an upper limit frequency in the broadcast wave band and respectively pass through the first propagation path and the second propagation path.
A vehicle antenna device has a high noise-resistance performance even in high-frequency bands and capable of preventing breakage of a connector due to corotation at the time of fastening/fixing. The vehicle antenna device includes a vehicle exterior antenna and a vehicle interior antenna module. The vehicle interior antenna module includes a circuit board, a module side coaxial connector, a housing and a protecting fixing part. When the vehicle interior antenna module is fastened/fixed to the vehicle exterior antenna through a roof, the protecting fixing part slidably fixes the circuit board to the housing with pressing force that the circuit board is slid where force applied to the module side coaxial connector is larger than a predetermined force if the vehicle exterior antenna and the vehicle interior antenna module corotate due to the fastening and that the circuit board is not slid by vibration of the vehicle.
H01Q 1/32 - Adaptation for use in or on road or rail vehicles
H01Q 1/22 - SupportsMounting means by structural association with other equipment or articles
B60R 11/02 - Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the likeArrangement of controls thereof
H01R 24/50 - Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts specially adapted for high frequency mounted on a PCB [Printed Circuit Board]
B60R 11/00 - Arrangements for holding or mounting articles, not otherwise provided for
A vehicle-body-embedded antenna device includes an antenna element, a circuit board, a coil and a ground bracket. The antenna element of a grounded type has an antenna capacitance adapted to function as a capacitive antenna that supports a first frequency band, and main polarization thereof is polarization substantially parallel to the roof surface. The coil is placed on the circuit board and connected to the power feeding part to which the antenna element is connected for making the antenna element to have an antenna length supporting a second frequency band. The ground bracket is directly grounded to a conductive member of the vehicle body which is provided at an angle different from an angle of the roof surface for improving polarization sensitivity of the antenna element substantially perpendicular to the roof surface.
H01Q 5/335 - Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors at the feed, e.g. for impedance matching
B60R 11/02 - Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the likeArrangement of controls thereof
H01Q 1/22 - SupportsMounting means by structural association with other equipment or articles
Provided is a composite antenna device for a vehicle, by which common mode noise can be reduced and a deterioration in reception performance can be avoided. The composite antenna device for a vehicle comprises: an antenna base 10; a roof conductor 20; a circuit board 30; an antenna element 40; a coaxial cable 50; an intermediate grounding section 60; and a circuit board grounding section 70. The roof conductor 20 is electrically connected to the antenna base 10 and to a vehicle roof R. The intermediate grounding section 60 electrically connects a grounding wire 52 to the antenna base 10 at a position close to the loop conductor 20 such that the antenna base is at the same potential as the roof conductor 20. The circuit board grounding section 70 electrically connects a ground pattern 31 to the antenna base 10 and is disposed such that the distance from the roof conductor 20 to the circuit board grounding section 70 is the same as or greater than the distance from the roof conductor 20 to the intermediate grounding section 60.
B60R 11/02 - Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the likeArrangement of controls thereof
H01Q 1/22 - SupportsMounting means by structural association with other equipment or articles
H01Q 1/32 - Adaptation for use in or on road or rail vehicles
Provided is an antenna device comprising: an antenna base comprising a longitudinal direction; a first antenna element positioned on the antenna base; and a pair of second antenna elements positioned on the antenna base and capable of transmitting and receiving radio waves in higher frequency bands than the first antenna element. In plan view, when the antenna base is divided into four regions by a first line segment in the longitudinal direction and a second line segment which is perpendicular to the first line segment, wherein said line segments intersect at a central point of the first antenna element, the region wherein one of the second antenna elements is positioned is not adjacent to the region wherein the other of the second antenna elements is positioned.
Provided is a vehicle-embedded type antenna device capable of being embedded in a vehicle while improving horizontal and vertical polarization characteristics. The vehicle-embedded type antenna device comprises an antenna element 10, a circuit substrate 20, and a grounding bracket 30. The antenna element 10 has an antenna capacitance for functioning as a capacitive antenna corresponding to a first frequency band, has an antenna length corresponding to a second frequency band, and is of a grounded type in which a polarization substantially parallel to a roof surface constitutes a main polarization. In order to improve the sensitivity of a polarization of the antenna element 10 substantially perpendicular to the roof surface, the grounding bracket 30 is directly grounded to a conductive member included in a part which has a portion arranged at a different angle from the roof surface and which is mounted to the body of the vehicle.
H01Q 1/32 - Adaptation for use in or on road or rail vehicles
H01Q 1/22 - SupportsMounting means by structural association with other equipment or articles
H01Q 5/357 - Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
H01Q 9/40 - Element having extended radiating surface
This antenna device for a vehicle includes: an antenna element which has a first main surface; a shielding plate which has a second main surface that faces the first main surface and is wider than the first main surface, and which is positioned between the antenna element and a noise generation source in the vehicle; and a insulation member which is positioned between the first main surface and the second main surface, and integrates the antenna element and the shielding plate.
H01Q 1/32 - Adaptation for use in or on road or rail vehicles
B60R 11/02 - Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the likeArrangement of controls thereof
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
H01Q 19/17 - Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave the primary radiating source comprising two or more radiating elements
Provided is a connector connection structure capable of absorbing fabrication variations and tolerances. This connector connection structure comprises a first connector assembled body 10, a first protective wall 11, a second connector assembled body 20, a second protective wall 21, a guide part 30, and an elastic member 40. The first protective wall 11 covers the periphery of the first connector assembled body 10. The second connector assembled body 20 mates with the first connector assembled body 10. The second protective wall 21 covers the periphery of the second connector assembled body 20 while being covered by the first protective wall 11. In the second protective wall 21, the outer side-surface has a vertical cross-sectionally tapered shape 22. The guide part 30 is provided so as to be able to slide between the first protective wall 11 and the second protective wall 21 to fill the gap therebetween. The surface of the guide part 30 on the second protective wall 21 side has a vertical cross-sectionally tapered shape 32 which makes contact with the surface of the vertical cross-sectionally tapered shape 22 of the second protective wall 21. The elastic member 40 presses the guide part 30 downward.
H01R 13/631 - Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure for engagement only
B60R 11/02 - Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the likeArrangement of controls thereof
H01Q 1/22 - SupportsMounting means by structural association with other equipment or articles
H01R 12/91 - Coupling devices allowing relative movement between coupling parts e.g. floating or self aligning
H01R 13/6583 - Shield structure with resilient means for engaging mating connector with separate conductive resilient members between mating shield members
H01R 13/74 - Means for mounting coupling parts to apparatus or structures, e.g. to a wall for mounting coupling parts in openings of a panel
A vehicle antenna device is provided that is appropriate for reducing thickness with a low-cost structure, while preventing the deterioration of antenna characteristics. The vehicle antenna device comprises an antenna element 10, a circuit board 20, a coil 30, an amp circuit 40, and a fixing part 50. The antenna element 10 functions as a capacitive antenna that supports a first frequency band. The circuit board 20 has a power supply part 21 to which a power supply line 12 of the antenna element 10 is connected. The coil 30 is electrically connected to the power supply part 21 so that the antenna element 10 has an antenna length corresponding to a second frequency band. The fixing part 50 is formed from the same member as the end part of the antenna element 10, in order to fix the circuit board 20 to the antenna element 10 in a position near the position at which the coil 30 is mounted and far from the position at which the amp circuit 40 is installed. The fixing part 50 is provided with a gap such that there is no effect from the coupling with the coil 30.
H01Q 1/32 - Adaptation for use in or on road or rail vehicles
H01Q 5/335 - Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors at the feed, e.g. for impedance matching
H01Q 9/30 - Resonant antennas with feed to end of elongated active element, e.g. unipole
A vehicle-mounted antenna device includes an antenna, an electronic component, a coaxial cable and a shielding member. The electronic component is electrically isolated from the antenna. The electronic component has a coaxial connector including an inner terminal and an outer terminal. The coaxial cable has one end connected to the coaxial connector. The shielding member is grounded to a vehicle body being ground. The shielding member is configured to block at least part of noise generated from the electronic component from reaching the antenna. The coaxial cable includes an inner conductor connected to the inner terminal and an outer conductor connected to the outer terminal. The electronic component is electrically connected to the shielding member via only the outer terminal.
Provided is a cable connection structure used in a vehicular antenna device that can be reduced in size, is easy to attach, and also has the required tensile strength. This cable connection structure comprises a connection terminal 10, a circuit substrate 20, a base plate 30, a positioning contact part 40, and a cable clamp 50. The connection terminal 10 is attached to a braided wire 3 of a coaxial cable 1. The circuit substrate 20 has a signal line connection hole 21 and a ground line connection hole 22. The base plate 30 has a cable insertion hole 31. The positioning contact part 40 is used for determining the position at which the circuit substrate 20 is disposed on the base plate 30. The cable clamp 50 grips a protective cladding 4 of the coaxial cable 1, holds a core wire 2 such that the core wire 2 is exposed at a prescribed height, and holds the connection terminal 10 such that the connection terminal 10 is exposed at a prescribed height.
H05K 1/18 - Printed circuits structurally associated with non-printed electric components
B60R 11/02 - Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the likeArrangement of controls thereof
H01Q 1/32 - Adaptation for use in or on road or rail vehicles
H01R 9/05 - Connectors arranged to contact a plurality of the conductors of a multiconductor cable for coaxial cables
H01R 12/51 - Fixed connections for rigid printed circuits or like structures
Provided is a vehicle-body-embedded antenna device which can be embedded in the body of a vehicle while exhibiting improved horizontal/vertical polarization characteristics. The vehicle-body-embedded antenna device comprises an antenna element 10, a circuit board 20, a coil 30, and a grounding bracket 40. The antenna element 10 has the antenna capacity to function as a capacitive antenna that accommodates a first frequency band and is of a grounded type using a polarization substantially parallel to a roof surface as the main polarization. The coil 30 is mounted on the circuit board 20 and is connected to a power supply unit 21 to which the antenna element 10 is connected such that the antenna element 10 has an antenna length that accommodates a second frequency band. The grounding bracket 40 is directly grounded to a body electroconductive member disposed at an angle different from that of the roof surface so as to improve the sensitivity of the antenna element 10 to a polarization substantially perpendicular to the roof surface.
H01Q 1/32 - Adaptation for use in or on road or rail vehicles
B60R 11/02 - Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the likeArrangement of controls thereof
H01Q 1/22 - SupportsMounting means by structural association with other equipment or articles
H01Q 5/335 - Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors at the feed, e.g. for impedance matching
H01Q 9/40 - Element having extended radiating surface
The present invention provides an antenna device for a vehicle, the antenna device having high noise resistance performance even in a high-frequency band and capable of preventing breakage of a connector due to corotation during fastening and fixing. This antenna device for a vehicle comprises an out-of-vehicle antenna 10 and an in-vehicle antenna module 20. The in-vehicle antenna module 20 is configured from a circuit board 21, a module-side coaxial connector 22, a housing 23 and a protection and fixing part 24. When the in-vehicle antenna module 20 is fastened and fixed to the out-of-vehicle antenna 10 via a roof R, the protection and fixing part 24 slidably fixes the circuit board 21 to the housing 23 by pressing force such that the circuit board 21 slides when the out-of-vehicle antenna 10 and the in-vehicle antenna module 20 corotate by fastening and force applied to the module-side coaxial connector 22 becomes larger than predetermined force, and such that the circuit board does not slide by vibration of the vehicle.
H01Q 1/22 - SupportsMounting means by structural association with other equipment or articles
B60R 11/02 - Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the likeArrangement of controls thereof
H01Q 1/32 - Adaptation for use in or on road or rail vehicles
H04B 1/3822 - Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving specially adapted for use in vehicles
An antenna device includes an antenna base, an antenna case, an antenna element and an elastic member. The antenna base includes an opening and a plurality of first fitting portions located at an interval from each other at a side wall of the opening; an antenna case secured to a first surface side of the antenna base. The antenna element is located in a space enclosed by the antenna base and the antenna case. The elastic member includes a plurality of second fitting portions fittable with the plurality of first fitting portions and a rib provided on a second surface side opposite to the first surface side and protruding in a direction away from the antenna base.
A composite patch antenna composite patch antenna device is capable of receiving signals in multiple frequency bands. The composite patch antenna composite patch antenna device includes a circuit board, a gap patch antenna, and a dielectric patch antenna. The gap patch antenna has a radiation element that is disposed in parallel with a predetermined air gap with respect to the circuit board, that has a hole section passing through substantially a center. The dielectric patch antenna is stacked on the radiation element of the gap patch antenna in the state of being electrically insulated, and has a second feeding line that is connected to the radiation electrode and that is connected to the second feeding section the circuit board by passing through the through-hole of the dielectric layer and the hole section of the radiation element of the gap patch antenna.
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 5/35 - Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using two or more simultaneously fed points
An in-vehicle antenna device 1 is provided with: a substrate 2 having a pair of opposite main surfaces 11, 12; an antenna element 3 which has a metallic plate part 21 that is disposed above the main surface 11 so as to be spaced away from the main surface 11, and metallic leg parts 24 that extend from the metallic plate part 21 toward the substrate 2 and are fixed to the substrate 2; and capacitance parts C which are electrically connected to the antenna element 3. The capacitance parts C are electrically connected to the metallic plate part 21 via the metallic leg parts 24 and each have two or more capacitors 13 that are connected in series.
A low-profile antenna device is provided for a vehicle. The low-profile antenna device includes a base plate, a circuit board, a base, a top-load element and a coil. The circuit board is disposed on the base plate, in parallel with the base plate. An amplifier circuit is placed on a front surface side of the circuit board, and a ground plate area having a ground plate and an empty area not having a ground plate are provided on a back, surface of the circuit board. The coil is disposed on the front surface side of the circuit board facing the empty area of the circuit board. The coil is disposed in a manner axially parallel with the circuit board, connected between the top-load element and the amplifier circuit, and adjusted to function as a resonance antenna.
H01Q 1/32 - Adaptation for use in or on road or rail vehicles
H01Q 9/40 - Element having extended radiating surface
H01Q 5/335 - Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors at the feed, e.g. for impedance matching
H01Q 1/36 - Structural form of radiating elements, e.g. cone, spiral, umbrella
H01Q 1/42 - Housings not intimately mechanically associated with radiating elements, e.g. radome
A composite antenna device is provided that is capable of achieving gain enhancement of a patch antenna and further miniaturization of the entire device size. A composite antenna device capable of receiving signals of a plurality of frequency bands for a vehicle includes a base plate, a first antenna, and a second antenna. The first antenna is constituted by a patch antenna placed on the base plate and capable of receiving signals of a first frequency band. The second antenna is constituted by a capacitive antenna capable of receiving signals of a second frequency band lower than the first frequency band. The second antenna includes a top load portion disposed so as to cover the first antenna and has at least one conductive planar body functioning also as a wave director for the first antenna.
H01Q 9/40 - Element having extended radiating surface
H01Q 19/22 - Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of a single substantially straight conductive element
H01Q 5/378 - Combination of fed elements with parasitic elements
H01Q 1/38 - Structural form of radiating elements, e.g. cone, spiral, umbrella formed by a conductive layer on an insulating support
H01Q 21/30 - Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
Provided is a vehicle-mounted antenna device with which a deterioration in the performance of an antenna can be adequately suppressed even if an electronic component is installed in the antenna device. A vehicle-mounted antenna device having an antenna 3 is provided with: an electronic component 7 which is electrically isolated from the antenna 3 and includes a connector 53 having an inner terminal 53a and an outer terminal 53b; a coaxial cable 61 one end of which is connected to the connector 53; and a shielding member 8 which is grounded to a vehicle body, which is an earth, and blocks at least a portion of noise generated by the electronic component 7 from reaching the antenna 3. The coaxial cable 61 includes an inner conductor connected to the inner terminal 53a and an outer conductor connected to the outer terminal 53b, and the electronic component 7 is electrically connected to the shielding member 8 via only the outer terminal 53b.
H01Q 1/32 - Adaptation for use in or on road or rail vehicles
B60R 1/00 - Optical viewing arrangementsReal-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
G03B 15/00 - Special procedures for taking photographsApparatus therefor
Provided is a compact connector for a vehicle, the connector making it possible to check whether or not a predetermined flexure margin is provided through a dimensional inspection at the time of manufacturing, providing a sufficient contact load, and reliably enabling electrical connection. The compact connector for a vehicle is constituted of a contact 10 and a receptacle 20. The contact 10 is formed of a conductive plate-shaped member by sheet metal working and includes: a suction face 11 that enables suction by a mounter; solder sections 12 that are located at positions facing the suction face 11 and that enable soldering; pole sections 13 interconnecting the suction face 11 and the solder sections 12; and plate-shaped contact sections 14 that are formed in a divergent fashion and that are flexible in closing directions. The receptacle 20 is formed of a conductive plate-shaped member by sheet metal working and includes a U-shaped sandwiching section 21 that sandwiches the contact sections 14 of the contact 10 while bending the contact sections 14, and an electrical connection with the contact 10 can be formed by bringing the inner side face of the sandwiching section 21 into contact with the outer side faces of the contact sections 14 of the contact 10.
An antenna element comprises a plate with a first opening, the plate including a first main surface and a second main surface opposed to each other, and a case. The case comprises: a first projection projecting toward an inside of the case and passing through the first opening; a first head provided to a tip end of the first projection, the first head being in contact with the first main surface; and a first supporter in contact with the second main surface. A first protrusion protruding from the first main surface or a first depression recessed from the first main surface is provided on an edge of the first opening. The first head covers the first protrusion and is in contact with at least a part of the first protrusion, or covers the first depression and is in contact with at least a part of the first depression.
A roof-mount antenna mounting structure, that can be reliably electrically connected and fixed to a vehicle roof and easily removed, includes an antenna base, first and second threaded portions, a leg washer, a leg-receiving portion, and a protruding portion. The leg washer has a washer ring having a hole through which the first threaded portion penetrates and a plurality of leg portions extending from the washer ring and each having a claw that can abut against the roof. The leg-receiving portion is detachably provided around the first threaded portion and has an abutment edge portion. The protruding portion has, at the inside of the leg portions, an inclined surface obliquely abutting against the abutment edge portion when the first and second threaded portions are fastened with each other to apply a pressing force to spread the leg portions outward with respect to the axis of the first threaded portion.
[Problem] To provide a low-profile antenna device able to be inexpensively manufactured by reducing the number of structural components and the number of assembly steps and the like without impairing antenna performance. [Solution] The low-profile antenna device for a vehicle comprises a base plate 10, a circuit substrate 20, a base 30, a top load element 40, and a coil 50. The circuit substrate 20 is positioned on the base plate 10 to be parallel with the base plate 10. An amplifier circuit 21 is mounted on the front surface side of the circuit substrate 20, and a ground plate area 22 having a ground plate and a blank area 23 not having a ground plate are provided on the rear surface of the circuit substrate 20. The coil 50 is positioned on the front surface side of the circuit substrate 20 facing the blank area 23 of the circuit substrate 20. The coil 50 is positioned so as to be axially parallel with the circuit substrate 20, connected between the top load element 40 and the amplifier circuit 21, and adjusted so as to function as a resonance antenna.
[Problem] To provide a composite patch antenna that can achieve a reduction in size, has wideband performance, and is usable when embedded in a dashboard or pasted on glass. [Solution] The composite patch antenna according to the present invention is able to receive signals over multiple frequency bands, and is provided with a circuit board 10, a gap-type patch antenna 20, and a dielectric patch antenna 30. The gap-type patch antenna 20 has a radiant element 21 which is disposed in parallel with respect to the circuit board 10 with a prescribed air gap G therebetween, and in which a hole 25 is formed to penetrate substantially the center thereof. The dielectric patch antenna 30 is laminated over the radiant element 21 of the gap-type patch antenna 20 in such a manner as to be electrically insulated therefrom, and has a second power supply line 33 that is connected to a radiation electrode 32 and that penetrates a through-hole 34 in a dielectric layer 31 and the hole 25 in the radiant element 21 of the gap-type patch antenna 20 so as to be connected to a second power supply unit 13 in the circuit board 10.
H01Q 13/08 - Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
H01Q 1/32 - Adaptation for use in or on road or rail vehicles
H01Q 5/35 - Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using two or more simultaneously fed points
H01Q 5/42 - Imbricated or interleaved structuresCombined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements using two or more imbricated arrays
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
A base plate where at least part of an antenna member is disposed, an inner cover attached to the base plate so as to cover at least part of the antenna member, and an outer cover covering the inner cover on the base plate, a locking claw for fixing the outer cover is provided on the inner cover side. A fixing piece engaged with the locking claw is provided on the outer cover side, an engaging portion of the fixing piece is formed as a concave surface instead of the through opening. The configuration eliminates the need for providing the fixing piece with a claw-shaped protrusion, damage of the fixing piece can be prevented. In addition, the fixing piece is not readily subject to a defect such as a weld, so that increased mechanical strength can be improved.
A first antenna and a second antenna (a patch antenna 109) are arranged in a single housing (a cover 101). The second antenna has a grounded conductor plate. The first antenna is a dipole antenna 210 receiving a vertically polarized radio wave, and has feed points positioned as high as or higher than the second antenna.
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
Provided is a composite antenna device that can be reduced in size by contriving the disposition of antenna elements and securing isolation therebetween. The composite antenna device can receive signals of a plurality of frequency bands and comprises a base part 10, a first frequency band element 20 and a second frequency band element 30. The first frequency band element 20 is disposed in a vertical direction when seen from a front surface of the composite antenna device and in a diagonal direction when seen from a side surface of the composite antenna device. The second frequency band element 30 is disposed in a vertical direction when seen from a front surface of the composite antenna device and in a diagonal direction when seen from a side surface of the composite antenna device. The first frequency band element 20 and the second frequency band 30 are disposed so as to extend in a V shape from a first power feeding part 21 and a second power feeding part 31. The second frequency band element 30 is bent midway therealong and has an open end-side part 32 that extends to a prescribed length from the position of the bend.
H01Q 1/32 - Adaptation for use in or on road or rail vehicles
H01Q 9/36 - Vertical arrangement of element with top loading
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 21/28 - Combinations of substantially independent non-interacting antenna units or systems
An antenna device that is built inside a hollow body fixed to a vehicle comprises a composite antenna element that has an antenna length corresponding to a first frequency band and is bent so as to also function as a capacitive antenna corresponding to a second frequency band and to improve an antenna effective capacitance and that is disposed in a substantially planar manner. The composite antenna element is disposed such that a planar direction thereof is inclined toward a vertical-direction side with respect to a metal body of the vehicle, and is offset-disposed to a left or right side in the hollow body with respect to a vehicle traveling direction, and is grounded in a metal portion of the vehicle near a position where the composite antenna element is disposed.
H01Q 1/32 - Adaptation for use in or on road or rail vehicles
H01Q 1/38 - Structural form of radiating elements, e.g. cone, spiral, umbrella formed by a conductive layer on an insulating support
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
[Problem] To provide a roof-mount antenna mounting structure that reliably enables electrical connection and fixation to a vehicle roof when being mounted and that also can easily be removed from the vehicle roof when being removed. [Solution] A roof-mount antenna mounting structure comprises an antenna base 10, a first threaded section 20, a second threaded section 30, a legged washer 40, a leg-receiving section 50, and a projecting section 60. The legged washer 40 has a washer ring 41 having a hole through which the first threaded section 20 penetrates, and a plurality of leg sections 42 having claws that extend from the washer ring 41 and can abut against a vehicle roof. The leg-receiving section 50 is provided detachably on the periphery of the first threaded section 20, and has an abutment edge-part 51. The projecting section 60 has an oblique surface inside of the leg sections 42, such that when the first threaded section 20 and the second threaded section 30 are fastened together, the oblique surface abuts obliquely against the abutment edge-part 51 of the leg-receiving section 50 and causes a pressing force to be applied to an axis of the first thread section 20 so as to outwardly spread the leg sections 42.
B60R 11/02 - Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the likeArrangement of controls thereof
H01Q 1/22 - SupportsMounting means by structural association with other equipment or articles
An antenna device attached to a vehicle includes a base to which an antenna is fixed, a cover that is attached to the base, and a flexible pad that covers and supports an edge of the base, contacts an edge of the cover, and is located between the vehicle and the cover. A protrusion is provided on a surface of the pad on the cover side, and includes a body portion formed along the edge of the base, and a plurality of rib-like portions extending from the body portion to an edge of the pad.
An antenna unit provided with: a base plate on which at least a part of an antenna member is disposed; an inner cover attached to the base plate while covering at least a part of the antenna member; and an outer cover covering the inner cover over the base plate, wherein a locking nail for affixing the outer cover is provided on the inner cover side. An affixing piece engaged with the locking nail is provided on the outer cover side, an engaging portion of the affixing piece being formed in a recessed surface shape instead of a through-opening. The configuration eliminates the need for providing the affixing piece with a nail-shaped protrusion, thereby preventing damage to the affixing piece. In addition, the affixing piece is not readily subject to a defect such as a weld, so that increased mechanical strength can be achieved.
A vehicle mounted antenna device installed on a vehicle includes a circuit board, a main element portion, and an auxiliary element portion. The main element portion, which has a substantially planar shape, is disposed on substantially the same plane as the circuit board, functions also as a capacitive antenna designed for a first frequency band, and includes a bent pattern having an antenna capacity substantially equivalent to a solid pattern. The auxiliary element portion includes a distributed constant element portion that is connected in series between the main element portion and an amplifier circuit so as to complement shortage of an antenna length of the main element portion so that the antenna length of the main element portion is designed for a second frequency band. The distributed constant element portion is mounted on the circuit board and has an antenna capacity smaller than that of the main element portion.
H01Q 1/32 - Adaptation for use in or on road or rail vehicles
H01Q 5/335 - Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors at the feed, e.g. for impedance matching
H01Q 1/36 - Structural form of radiating elements, e.g. cone, spiral, umbrella
Provided is a low-profile antenna device that allows the height of an antenna to be further reduced. The low-profile antenna device comprises a base section, a helical antenna section, and a top load section. The helical antenna section is wound along an oblique axial direction starting from the base section. The conductive top load section, which is electrically connected to the tip of the helical antenna section, has a top section that is provided on the opposite side to a vehicle, to which the antenna device is fixed, and side sections that are provided on the vehicle side in oblique directions from the top section such that no part of the helical antenna section is placed between the top load section and the vehicle in the direction of a perpendicular line formed therebetween.
The antenna device disclosed includes an insulating antenna case, an antenna base, and an umbrella-type element. A lower surface of the insulating antenna case is open and a housing space is formed in the insulating antenna case. The antenna base includes an insulation base on which the antenna case is fitted, and a conductive base which is smaller than the insulation base and is fixed to the insulation base. The umbrella-type element is provided on the antenna base in such a way that a rear section thereof is located above the insulation base and a front section thereof is located above the conductive base.
A vehicle-mounted circuit board holder structure (1) is provided with: a circuit board (2) for processing a signal from an antenna element; a holder member (3) that holds the circuit board (2) from both sides of a mount surface in a sandwiching manner; and a mold member (M1) that covers at least a part of the circuit board (2) and the holder member (3).
Provided is a vehicle-mounted antenna device having improved S/N characteristics and directivity. The antenna device, built into a hollow body such as a spoiler (2) fixed to a vehicle (1), is provided with a composite antenna element (10) having an antenna length that corresponds to a first frequency band, the composite antenna element (10) being bent and disposed in a substantially planar manner in order to improve the antenna effective capacitance so as to also function as a capacitance antenna that corresponds to a second frequency band. The composite antenna element (10) is disposed so that the planar direction is angled toward the vertical direction with respect to the metal body of the vehicle (1), is placed so as to be offset to either the left or the right of the interior of the hollow body with respect to the direction of vehicle travel, and is grounded to the metal portion of the vehicle in the vicinity of the placement position.
Provided is an on-board antenna waterproof structure that eliminates the need for assembling a waterproof structure by manual work, thus preventing an attachment error, and in which waterproof resin is strongly fused to a resin base. A waterproof structure applied in an on-board antenna installed on an antenna installment surface comprises a resin base (10) made of resin, and a flexible, antenna installed-side waterproof resin portion (20). The resin base (10) has one surface facing the antenna installment surface and the other surface being covered by an antenna cover (3) defining an outer shape of the on-board antenna. The antenna installed-side waterproof resin portion (20) abuts the antenna installment surface.
H01Q 1/02 - Arrangements for de-icingArrangements for drying-out
B60R 11/02 - Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the likeArrangement of controls thereof
H01Q 1/22 - SupportsMounting means by structural association with other equipment or articles
H01Q 1/32 - Adaptation for use in or on road or rail vehicles
87.
INVERTED-F ANTENNA, AND ON-BOARD COMPOSITE ANTENNA DEVICE
An inverted-F antenna is provided with: a ground member; a short-circuiting portion electrically coupled to the ground member and vertically rising from the ground member; a flat plate portion electrically coupled to the short-circuiting portion and extending from an upper end of the short-circuiting portion; a first antenna member including a protruding portion protruding from a part of an edge of the flat plate portion; and a second antenna member including a conductor pattern that has on one edge portion a feed portion and that has an increasingly greater width toward the other edge portion, the conductor pattern being electrically coupled to the flat plate portion. The second antenna member is disposed between the ground member and the flat plate portion with a predetermined distance from an edge of the flat plate portion on the opposite side from the protruding portion.
An outer peripheral wall and an inner peripheral wall are formed in the lower part of a shark-fin antenna case. The lower end surface of the inner peripheral wall is bonded to the upper surface of an insulating base in an antenna base arranged on the lower surface of the antenna case. Thus, an antenna assembly can be housed in the antenna case which is constructed to be waterproof. The antenna assembly is provided with an element holder that is arranged upright on the antenna base; an umbrella-shaped element that is fixed to the top part of the element holder in such a way that the rear part thereof is positioned above the insulating base; an amplifier substrate for amplifying a reception signal of the umbrella-shaped element; and a coil that causes the umbrella-shaped element to resonate at the specified frequency.
A perpendicular substrate antenna 7 is fixed vertically on an upper surface of a baseplate 3. An antenna pattern 18 is formed on the surface of the perpendicular substrate antenna 7 and a coil is 13 mounted. A plate shaped antenna 8 is attached to an upper edge of the perpendicular substrate antenna 7. The plate shaped antenna 8 includes a structure in which a pair of flat parts 81, 82 are connected via clip parts 83˜86 and contact arms 93, 84, 62, 64 which contact the surface of the perpendicular substrate antenna 7 and latching arms 96, 97, 61, 62 which pass through perpendicular substrate antenna 7 and contact the opposite side surface each protrude from a lower edge of each flat part 81, 82.
The antenna device disclosed includes an insulating antenna case, an antenna base, and an umbrella-type element. A lower surface of the insulating antenna case is open and a housing space is formed in the insulating antenna case. The antenna base includes an insulation base on which the antenna case is fitted, and a conductive base which is smaller than the insulation base and is fixed to the insulation base. The umbrella-type element is provided on the antenna base in such a way that a rear section thereof is located above the insulation base and a front section thereof is located above the conductive base.
The antenna device disclosed includes an insulating antenna case, an antenna base, an umbrella-type element, an amplifier substrate, and a coil. A lower surface of the insulating antenna case is open and a housing space is formed in the insulating antenna case. The antenna case is fitted on the antenna base. The umbrella-type element is provided on the antenna base. The amplifier substrate includes an amplifier which amplifies a signal received by the umbrella-type element, and is disposed on the antenna base. The coil is inserted between an output end of the umbrella-type element and an input end of the amplifier to make the umbrella-type element resonate at a predetermined frequency, and is disposed substantially at a center in a width direction of the umbrella-type element.
Provided is a low-profile antenna device that allows the height of an antenna to be further reduced. The low-profile antenna device comprises a base section (10), a helical antenna section (20), and a top load section (30). The helical antenna section (20) is wound along an oblique axial direction starting from the base section (10). The conductive top load section (30), which is electrically connected to the tip of the helical antenna section (20), has a top section (31) that is provided on the opposite side to a vehicle, to which the antenna device is fixed, and side sections (32) that are provided on the vehicle side in oblique directions from the top section such that no part of the helical antenna section is placed between the top load section and the vehicle in the direction of a perpendicular line formed therebetween.
[Problem] To provide a roof mount antenna device for a vehicle, the roof mount antenna device being reliably temporarily affixed to the roof of the vehicle and having a temporary affixation section having a high degree of design freedom. [Solution] A roof mount antenna device for a vehicle comprises an antenna base (10), a pipe-shaped leg section (20), and a temporary affixation section (30). The pipe-shaped leg section (20) protrudes from the surface of the antenna base (10) which faces the vehicle roof (R). The temporary affixation section (30) is provided extending to the antenna base (10) side from the vicinity of the front end of the pipe-shaped leg section (20). An engagement claw (31) is provided on the front end side of the temporary affixation section (30), the engagement claw (31) being configured so as to be capable of deflecting about the vicinity of the front end of the pipe shaped leg section, the engagement claw (31) engaging with an installation hole provided in the vehicle roof. The engagement claw (31) deflects toward the inside of the pipe-shaped leg section (20) when the pipe-shaped leg section (20) penetrates through the installation hole (H), and after the penetration, the engagement claw (31) returns to the original position and engages with the installation hole (H).
B60R 11/02 - Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the likeArrangement of controls thereof
H01Q 1/22 - SupportsMounting means by structural association with other equipment or articles
An antenna apparatus that can suppress sensitivity degradation as much as possible to receive AM broadcasts and FM broadcasts even if an antenna height is decreased to 70 mm or less. An antenna board is vertically mounted on a planar antenna base, and a top portion is disposed to stride over the antenna board. An antenna element includes the top portion and an antenna pattern formed on the antenna board. A distance between the antenna base and a lower edge of the top portion is not less than 10 mm, and the lower edge of the top portion is bent downward. The top portion is configured such that an antenna capacitance of the antenna element becomes about 3 pF or more. A received signal from the antenna element is guided to an amplifier board through a connecting wire and amplified. An antenna case is fitted in the antenna base.
An antenna apparatus that can suppress sensitivity degradation as much as possible to receive AM broadcasts and FM broadcasts even if an antenna height is decreased to 70 mm or less. An antenna board is vertically mounted on a planar antenna base, and a top portion is disposed to stride over the antenna board. An antenna element includes the top portion and an antenna pattern formed on the antenna board. A distance between the antenna base and a lower edge of the top portion is not less than 10 mm, and the lower edge of the top portion is bent downward. The top portion is configured such that an antenna capacitance of the antenna element becomes about 3 pF or more. A received signal from the antenna element is guided to an amplifier board through a connecting wire and amplified. An antenna case is fitted in the antenna base.
In the present invention, a series resonance circuit of a coil (L1) and a capacitor (C1) resonating in an FM band is connected to a terminal (1) of an impedance transformation transformer (T). As a result, the terminal (1) is in an ungrounded state in the AM band. Therefore, the signal of the AM band passes through the impedance transformation transformer (T), is output from a terminal (3), and, via a capacitor (C3), is output from a port (PT2). Furthermore, the terminal (1) is grounded in the FM band. Therefore, the signal of the FM band is impedance-transformed at the impedance transformation transformer (T) so as to be output from the terminal (3), and, via the capacitor (C3), is output from the port (PT2). As a result, it is possible to reduce pass-through loss in the AM band and the FM band, and to achieve a superior VSWR in the FM band.
The gain in the vicinity of 2 GHz is improved by making the outer diameter Φ of a passive element (11) approximately 80-110 mm. The VSWR, which deteriorates due to the reduction in the outer diameter Φ, can be improved by forming the short-circuit pins (11c), which short-circuit the passive element (11) to a base (13), in a meandering shape. Thus, a wide band antenna with improved electrical characteristics can be achieved.
H01Q 9/40 - Element having extended radiating surface
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 13/08 - Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
[Problem] To provide a plurality of antenna elements in a limited space so that the antenna elements do not impact one another. [Solution] An antenna substrate (12) is arranged on an antenna base (11) so that it stands erect, and a first element (15) and a second element (16) are formed on the antenna substrate (12). A top section (14) is provided on the top of the first element (15), a coil unit (13) is provided on the bottom of the first element (15), and the entire assembly resonates in the FM frequency. The height of the top section (14) from the antenna base (11) is set at 20mm or greater and the gap between the first element (15) and the second element (16) is approximately 10mm or greater so that the first element (15) operates efficiently in the AM frequency.
An outer peripheral wall and an inner peripheral wall are formed in the lower part of a shark-fin antenna case (10). The lower end surface of the inner peripheral wall is bonded to the upper surface of an insulating base (20) in an antenna base (11) arranged on the lower surface of the antenna case (10). Thus, an antenna assembly can be housed in the antenna case (10) which is constructed to be waterproof. The antenna assembly is provided with: an element holder (12) that is arranged upright on the antenna base (11); an umbrella-shaped element (13) that is fixed to the top part of the element holder (12) in such a way that the rear part thereof is positioned above the insulating base (20); an amplifier substrate (16) for amplifying a reception signal of the umbrella-shaped element; and a coil (14) that causes the umbrella-shaped element (13) to resonate at the specified frequency. Therefore, the antenna base can be formed without requiring a strengthening member.
[Problem] To enable an entire element to function efficiently as an antenna in a limited space, and to enable antenna properties to be improved, in a low profile antenna device with limited element-accommodating space. [Solution] A low profile antenna device for use in a vehicle comprises a base unit (120), and an antenna unit (130). The antenna unit (130) is supported on the base unit (120), and is provided with a first helical unit on the side near to the base unit (120), and a second helical unit on the side far from the base unit (120). The second helical unit is configured such that the surface area is larger per unit length than that of the first helical unit.
