Antenna device
AssigneeAlps Alpine Co., Ltd.
InventorYuanzhu Dou
Life of this patent
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Abstract
An antenna device includes: a waveguide; a transmission antenna disposed on the same side as a first opening in the waveguide, the transmission antenna transmitting a radio wave through the waveguide; a reception antenna disposed on the same side as the first opening in the waveguide, the reception antenna receiving a radio wave through the waveguide; and a lens, disposed on the same side as a second opening in the waveguide, through which the radio wave transmitted from the transmission antenna or the radio wave to be received by the reception antenna passes. The first opening has a larger opening area than the second opening. The transmission antenna and reception antenna are placed with an offset from the optic axis of the lens.
Claims10
An antenna device comprising:
- a waveguide having a first opening on a first end, a second opening on a second end opposed to the first end;
- a transmission antenna disposed in the waveguide at the first opening, the transmission antenna transmitting a transmission radio wave through the waveguide;
- a reception antenna disposed in the waveguide at the first opening, the reception antenna receiving a reception radio wave through the waveguide;
- and
- a lens disposed in the wave guide at the second opening, the lens having an optical axis extending in a first direction, the transmission radio wave being emitted from the waveguide through the lens, and the reception radio wave coming into the waveguide through the lens;
- wherein an area of the first opening is greater than that of the second opening,
- and wherein the transmission antenna and the reception antenna are placed with an offset from the optical axis of the lens.
Dependencies are inferred from the claim text.