Abstract: Rear glass is provided with a patch-like radiation conductor and a first ground conductor surrounding the patch-like radiation conductor. An electronic circuit unit includes a base plate fixed on the rear glass; a frame body which houses a circuit substrate and is fixed on the base plate; and a cover for covering the frame body. One surface of the circuit substrate defines a component-holding surface which is connected with a second end of a feeder cable connected with the radiation conductor and the first ground conductor. The other surface of the circuit substrate is provided with a second ground conductor to function as a radio-wave reflective surface. The radio-wave reflective surface faces the radiation conductor and the first ground conductor disposed on the rear glass such that the radio-wave reflective surface is separated from the radiation conductor and the first ground conductor by a predetermined distance.

Abstract: Rear glass is provided with a radiation conductor and a ground conductor. An electronic circuit unit includes a base plate fixed on the rear glass; a frame body which houses a circuit substrate and is screwed on the base plate; and a cover for covering the frame body. The frame body and the cover are provided with drainage holes. These drainage holes are provided at the bottommost portion of the electronic circuit unit in a state where the electronic circuit unit is mounted on the rear glass. Furthermore, the frame body is provided with a plurality of tongue pieces that are bent in order to support the circuit substrate, and clearance holes provided for forming the tongue pieces. The clearance holes that are disposed in one of side walls of the frame body are used as drainage holes.

Abstract: An on-board antenna includes a radiation element provided on a dielectric substrate, a grounding conductor surrounding a periphery of an outer edge portion of the radiation element at a position spaced away outwardly from the outer edge portion, and a conductive member provided on the surface at a position spaced away outwardly from an outer edge portion of the grounding conductor.

Abstract: A vehicle-mounted antenna of the present invention includes a grounding conductor arranged on a vehicle interior side surface of a rear window that inclines at a predetermined inclination angle with respect to the horizontal plane, a slot and a U-shaped auxiliary slot formed in the grounding conductor, and an electrically conductive reflecting plate that protrudes in a direction that forms a predetermined angle with respect to the surface of the grounding conductor so as to slope downward towards the front of the vehicle from a location shifted downward in the vertical direction (front of the vehicle) from the slot on the surface of the grounding conductor at a location close to the slot.

Abstract: An on-board antenna including a radiation element provided on a dielectric substrate, and a grounding conductor surrounding a periphery of an outer edge portion of the radiation element at a position spaced away outwardly from the outer edge portion, wherein the radiation element has an inner cut-out portion so that the surface of the dielectric substrate to be exposed therethrough.

Abstract: Rear glass is provided with a patch-like radiation conductor and a first ground conductor surrounding the patch-like radiation conductor. An electronic circuit unit includes a base plate fixed on the rear glass; a frame body which houses a circuit substrate and is fixed on the base plate; and a cover for covering the frame body. One surface of the circuit substrate defines a component-holding surface which is connected with a second end of a feeder cable connected with the radiation conductor and the first ground conductor. The other surface of the circuit substrate is provided with a second ground conductor to function as a radio-wave reflective surface. The radio-wave reflective surface faces the radiation conductor and the first ground conductor disposed on the rear glass such that the radio-wave reflective surface is separated from the radiation conductor and the first ground conductor by a predetermined distance.

Abstract: Rear glass is provided with a radiation conductor and a ground conductor. An electronic circuit unit includes a base plate fixed on the rear glass; a frame body which houses a circuit substrate and is screwed on the base plate; and a cover for covering the frame body. The frame body and the cover are provided with drainage holes. These drainage holes are provided at the bottommost portion of the electronic circuit unit in a state where the electronic circuit unit is mounted on the rear glass. Furthermore, the frame body is provided with a plurality of tongue pieces that are bent in order to support the circuit substrate, and clearance holes provided for forming the tongue pieces. The clearance holes that are disposed in one of side walls of the frame body are used as drainage holes.

Abstract: An on-board antenna having a grounding conductor provided on a surface of a first dielectric substrate and an antenna element including a first radiation element provided on the surface of the first dielectric substrate and a second radiation element provided on the first radiation element so as to protrude from a surface of the first dielectric substrate and extend in a vertical direction.

Abstract: An automotive on-board antenna includes a diversity system for performing diversity transmission and reception by a front plane antenna 11 using a windscreen of a vehicle as a dielectric substrate and a rear plane antenna 12 using a rear window glass as a dielectric substrate.

Abstract: An on-board antenna comprising a radiation element provided on a dielectric substrate, a grounding conductor surrounding a periphery of an outer edge portion of the radiation element at a position spaced away outwardly from the outer edge portion, a substantially box-shaped reflecting member including an opening thereof. The opening of the reflecting member is closed by the surface of the dielectric substrate so as to face the radiation element, and a conductive member is provided at least partially on an inner surface of the reflecting member.

Abstract: A vehicle antenna including a dielectric substrate having a surface, a first radiator disposed on the surface of the dielectric substrate and having an aperture therein at which the surface is partially exposed, a first ground conductor disposed on the surface of the dielectric substrate and surrounding the first radiator while providing a substantially loop-shaped space between the first radiator and the first ground conductor, a second radiator disposed on the surface of the dielectric substrate and in the aperture of the first radiator, and a second ground conductor disposed on the surface of the dielectric substrate and surrounding the second radiator while providing another substantially loop-shaped space between the second radiator and the second ground conductor.

Abstract: A vehicle-mounted antenna of the present invention includes a grounding conductor arranged on a vehicle interior side surface of a rear window that inclines at a predetermined inclination angle with respect to the horizontal plane, a slot and a U-shaped auxiliary slot formed in the grounding conductor, and an electrically conductive reflecting plate that protrudes in a direction that forms a predetermined angle with respect to the surface of the grounding conductor so as to slope downward towards the front of the vehicle from a location shifted downward in the vertical direction (front of the vehicle) from the slot on the surface of the grounding conductor at a location close to the slot.

Abstract: A vehicle antenna including a dielectric substrate having a surface, a first radiator disposed on the surface of the dielectric substrate and having an aperture therein at which the surface is partially exposed, a first ground conductor disposed on the surface of the dielectric substrate and surrounding the first radiator while providing a substantially loop-shaped space between the first radiator and the first ground conductor, a second radiator disposed on the surface of the dielectric substrate and in the aperture of the first radiator, and a second ground conductor disposed on the surface of the dielectric substrate and surrounding the second radiator while providing another substantially loop-shaped space between the second radiator and the second ground conductor.

Abstract: An on-board antenna includes a radiation element provided on a dielectric substrate, a grounding conductor surrounding a periphery of an outer edge portion of the radiation element at a position spaced away outwardly from the outer edge portion, and a conductive member provided on the surface at a position spaced away outwardly from an outer edge portion of the grounding conductor.

Abstract: An automotive on-board antenna includes a diversity system for performing diversity transmission and reception by a front plane antenna 11 using a windscreen of a vehicle as a dielectric substrate and a rear plane antenna 12 using a rear window glass as a dielectric substrate.

Abstract: An on-board antenna having a grounding conductor provided on a surface of a first dielectric substrate and an antenna element including a first radiation element provided on the surface of the first dielectric substrate and a second radiation element provided on the first radiation element so as to protrude from a surface of the first dielectric substrate and extend in a vertical direction.

Abstract: An on-board antenna comprising a radiation element provided on a dielectric substrate, a grounding conductor surrounding a periphery of an outer edge portion of the radiation element at a position spaced away outwardly from the outer edge portion, a substantially box-shaped reflecting member including an opening thereof. The opening of the reflecting member is closed by the surface of the dielectric substrate so as to face the radiation element, and a conductive member is provided at least partially on an inner surface of the reflecting member.

Abstract: An on-board antenna including a radiation element provided on a dielectric substrate, and a grounding conductor surrounding a periphery of an outer edge portion of the radiation element at a position spaced away outwardly from the outer edge portion, wherein the radiation element has an inner cut-out portion so that the surface of the dielectric substrate to be exposed therethrough.