Abstract: An antenna system for vehicles includes a first antenna attached in a vicinity of a windshield of a vehicle; and a second antenna attached in a vicinity of a rear glass of the vehicle, wherein the first antenna and the second antenna are configured to transmit and receive an electromagnetic wave in a predetermined frequency band F, and wherein defining a region A and a region B with respect to a vehicle center axis extending in a traveling direction of the vehicle, so as to bisect a vehicle width of the vehicle from a viewpoint in a direction normal to a horizontal plane, the first antenna is arranged in the region A, and the second antenna is arranged in the region B.

Abstract: An antenna includes a first conductor plate and a second conductor plate, the second conductor plate being disposed in the first conductor plate so as to be apart from the first conductor plate with a distance between both plates; wherein the first conductor plate includes a first U-shaped portion, the first U-shaped portion being formed in a U-shape so as to include a first side portion, a second side portion opposed to the first side portion, and a first front portion connected between the first side portion and the second side portion; wherein the second conductor plate includes a second U-shaped portion, the second U-shaped portion being formed in a U-shape so as to include a third side portion, a fourth side portion opposed to the third side portion, and a second front portion connected between the third side portion and the fourth side portion.

Abstract: An antenna including: a radiating plate having a radiating surface; a ground plate disposed on the radiating plate with a dielectric interposed therebetween; and a parasitic element including: a first parasitic conductor disposed in a first direction with respect to a center of gravity of the radiating plate in a plan view of the radiating plate; a second parasitic conductor disposed in a second direction opposite to the first direction with respect to the center of gravity of the radiating plate in a plan view of the radiating plate; and a third parasitic conductor connecting the first parasitic conductor and the second parasitic conductor, in which the third parasitic conductor includes a portion that passes in a vicinity of the center of gravity of the radiating plate and extends in the first direction and the second direction in a plan view of the radiating plate.

Abstract: A vehicle-type-antenna-device includes: a dielectric plate for a vehicle; and an antenna attached to the dielectric-plate; wherein the antenna includes: a dielectric-layer disposed along a curved-surface of the dielectric-plate, a conductive-layer laminated on the dielectric-layer and having a planar-pattern formed thereon, a feeding portion electrically connected to the planar-pattern, and an electronic-component electrically connected to the conductive-layer and having a higher rigidity than a combined rigidity of the dielectric-layer and the conductive-layer, wherein a curved-region of the dielectric-plate is defined as an extent to which the dielectric-layer-is attached to the curved-surface includes a first-curved line having a smallest radius-of-curvature in the curved-region and a second-curved line intersecting the first-curved line and having a radius-of-curvature larger than that of the first-curved line, and a longitudinal direction of an extent of the dielectric-plate to which the electronic-compo

Abstract: To provide a vehicle antenna device which can secure desired antenna characteristics of both a satellite antenna and a communication antenna. A vehicle antenna device comprising a dielectric attached to a vehicle, a conductor plate placed adjacent to the dielectric plate, a satellite antenna disposed below the conductor plate, receiving radio waves which arrive from a satellite through the dielectric plate, and a communication antenna disposed below the satellite antenna, transmitting/receiving radio waves to/from outside the vehicle through the dielectric plate in a horizontal direction, wherein the satellite antenna comprises a radiating conductor which does not overlap the conductor plate from a vertical view, and a ground conductor positioned between the radiating conductor and the communication antenna.

Abstract: A window glass for a vehicle including a glass plate, a light shielding layer on the glass plate and a planar antenna including a planar conductor with a hollowed-out portion with at least one hole, wherein, when a region including the light shielding layer is assumed as a light shielding region; and a region including no light shielding layer is assumed as a transmission region, the planar antenna is arranged to lie across a boundary between the light shielding region and the transmission region, and has a first conductor part overlapping the light shielding region and a second conductor part overlapping the transmission region, and, wherein, when an area of overlap of the planar antenna with the light shielding region is assumed as a first overlap area; an area of overlap of the planar antenna with the transmission region is assumed as a second overlap area.

Abstract: An EBG structure-attached glass plate includes a vehicle roof glass for attachment to a metal frame of a vehicle body, an EBG structure that is disposed on a first main face of the roof glass, that has a predetermined conductor pattern periodically disposed thereon, and that is formed in a frame shape, and a radio wave transmitting and receiving region surrounded by the EBG structure.

Abstract: An antenna device comprises a dielectric substrate, an antenna including a radiation plate and a ground conductor plate, a connector, and cover member. A position of a feeding point on the radiation plate is different to a position of a centroid of the radiation plate in front view of the antenna, and the antenna and the cover member cover a periphery of the connector when the antenna, the connector, and the cover member are viewed along a direction orthogonal to a first straight line connecting the centroid to the feeding point and orthogonal to a thickness direction of the dielectric substrate.

Abstract: An antenna device with an attachment member includes an antenna including a radiation plate provided with radiation face that radiates vertically polarized waves, a housing portion that houses the antenna, an attachment member that attaches the housing portion to a vehicle, and a metal fixing portion that is formed in an elongated shape to one end of the attachment member, that abuts a back face of the housing portion facing toward an opposite side to the radiation face, and that fixes the housing portion. Viewed from a thickness direction of the radiation plate, the fixing portion is disposed between a first region formed to the back face on one side in the extension direction of a first straight line, and a second region formed to the back face on another side in the extension direction of the first straight line.

Abstract: An antenna includes a radiation plate 56 equipped with a radiation surface that radiates radio waves and a feed point that is a location supplied with power from a transmission line. When looking at the radiation plate along a horizontal direction, the feed point is provided at a position separated from a centroid of the radiation plate by a distance A. When looking along a thickness direction of the radiation plate, locations between an end portion of the transmission line connected to the feed point and an intersection portion intersecting with a peripheral edge portion of the conductor plate, overlap in the thickness direction of the radiation plate with a specified area between a third straight line and a fourth straight line.

Abstract: There is provided a simple configuration capable of feeding power to a conductor present between a pair of dielectric plates. A feeding structure including a first dielectric plate; a second dielectric plate that faces the first dielectric plate; an interlayer that is disposed between the first dielectric plate and the second dielectric plate; a conductor that is disposed between the first dielectric plate and the second dielectric plate; a feeding portion that is disposed on a side opposite of the interlayer from the first dielectric plate and that sandwiches at least one of a portion of the interlayer and a portion of the second dielectric plate between the conductor and the feeding portion; and a first transmission line that is connected to the feeding portion, wherein the feeding portion electromagnetically couples to the conductor with a gap smaller than a thickness of the first dielectric plate.

Abstract: A planar antenna comprising a slot formed in a flat conductor, wherein the slot includes a first slot extending in a first direction between a first feeding point and a second feeding point, a second slot extending in a second direction different from the first direction from an end portion of the first slot, a third slot extending in a fourth direction opposite to the second direction from an end portion of the first slot in a third direction opposite to the first direction, reaching an open end in the fourth direction, and a J-shaped slot extending from an end portion of the second slot in the second direction to an open end open in the first direction, and wherein a slot width at an open end of the J-shaped slot is wider than a slot width at the end portion of the second slot in the second direction.

Abstract: Provided is a vehicle antenna system that is able to efficiently receive circularly polarized signals from the zenith direction. A vehicle antenna system (100) is provided with window glass (30) for a vehicle (20) and an antenna element (40) that is able to receive signals of a predetermined frequency band. The antenna element (40) is provided on a first principal plane of a dielectric substrate (43), and includes a radiating conductor (41) that is able to receive circularly polarized signals of a first frequency, and a grounding conductor (44) positioned opposite the radiating conductor (41) via the dielectric substrate (43). The normal direction of the first principal plane is less than or equal to 45° relative to the vertical direction, and the radiating conductor (41) is positioned away from the inner surface of the window glass (30) via the dielectric layer (60) in the direction of the vehicle interior.

Abstract: To provide a vehicle antenna device which includes multiple antennas, the frequency bands of radio waves to be transmitted and received by the multiple antennas being at least partially different from each other, proximate to each other and which can reduce the degradation of the transmission/reception sensitivity of each of the multiple antennas. A vehicle antenna device to be mounted on a vehicle, comprising: a first antenna capable of transmitting and receiving radio waves of a first frequency band; and a second antenna proximate to the first antenna and capable of transmitting and receiving radio waves of a second frequency band including a frequency band higher than the first frequency band, wherein at least one of the first antenna and the second antenna is disposed in or on window glass of the vehicle or in the vicinity of the window glass, and wherein the second antenna includes a power supply unit to which a high-pass filter is connected.

Abstract: A vehicle antenna includes: a vehicle window glass an electronic device provided in a vicinity of a vehicle width direction central portion at or near upper portion of the vehicle window glass; and an antenna attached to the upper portion of the vehicle window glass such that a normal to a radiation surface passes through a principal surface. A vehicle width direction central position of the antenna is separated from a reference position that is a vehicle width direction center of the electronic device.

Abstract: An antenna system includes a glass plate, a resin layer, and an antenna, wherein a predetermined frequency of 3 GHz or greater is defined as F, a transmission coefficient S21 of the glass plate concerning an incident wave of F is defined as S21G, S21 of a laminate concerning the F is defined as S21GR, a frequency closest to F at which S21 of the glass plate becomes a maximum is defined as FP, S21 of the glass plate concerning an incident wave of FP is defined as S21GP, a frequency closest to F among frequencies of incident waves at which S21 of the glass plate becomes a minimum is defined as FV, and S21 of the glass plate concerning an incident wave of FV is defined as S21GV, and wherein a thickness of the resin layer is configured such that: S21GR?S21G?(S21GP?S21GV)×0.2.

Abstract: A window glass apparatus for a vehicle including a first bus bar provided in or on the glass plate and including an upper portion extending in a direction along an upper edge of the glass plate; a second bus bar provided in or on the glass plate and including a lower portion extending in a direction along a lower edge of the glass plate; and an antenna disposed in a space near the upper portion and configured to transmit and receive a radio wave having a certain frequency; wherein the glass plate has a heating area extending between the upper portion and the lower portion, and a non-heating area extending above the upper portion; wherein the heating area is an area where a conductive member is disposed, the conductive member being configured to flow a direct current in an up-down direction.

Abstract: An antenna and an antenna apparatus for vehicle that can achieve reduction in size are provided. The antenna includes a dielectric body, a radiation conductor disposed on a first principal surface side of the dielectric body, and a ground conductor disposed on a second principal surface side of the dielectric body. The ground conductor is a planar conductor disposed within a rectangular region having a length LG1 in a first direction and a length LG2 in a second direction. When the ground conductor is divided into a first region and a second region, the ground conductor includes a slit that starts extending toward the inside of the ground conductor starting from an outer edge of the ground conductor in the first region.

Abstract: An antenna system for vehicle includes a vehicle and a MIMO antenna that is mounted on the vehicle and that transmits and receives radio waves of a predetermined frequency. The MIMO antenna includes antennas including a first antenna that mainly transmits and receives a first polarized wave and a second antenna that mainly transmits and receives a second polarized wave orthogonal to the first polarized wave, and the antennas are dispersedly arranged on the vehicle. One of the first antenna and the second antenna are arranged based on at least one of (1) a configuration in which one is arranged in a central region and another one is arranged in a first peripheral region or a second peripheral region and (2) a configuration in which one is arranged in a first region and another one is arranged in a second region.

Abstract: An antenna system for a vehicle includes a plurality of antenna sets provided on or in proximity to a dielectric arranged on front and rear sides or on right and left sides of the vehicle, or arranged on both thereof, wherein a first antenna set includes first and second antennas, a second antenna set includes third and fourth antennas, a third antenna set includes fifth and sixth antennas, a fourth antenna set includes seventh and eighth antennas, each of the first, third, fifth, and seventh antennas has a higher antenna gain for transmitting and receiving a horizontally polarized wave than transmitting and receiving a vertically polarized wave, and each of the second, fourth, sixth, and eighth antennas has a higher antenna gain for transmitting and receiving the vertically polarized wave than transmitting and receiving the horizontally polarized wave.