US 12,306,329 B2
Radio wave sensor and occupant detection device
Yasunori Hoshihara, Tokyo (JP); and Takumi Takei, Tokyo (JP)
Assigned to MITSUBISHI ELECTRIC CORPORATION, Tokyo (JP)
Appl. No. 18/035,050
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Jan. 29, 2021, PCT No. PCT/JP2021/003134
§ 371(c)(1), (2) Date May 2, 2023,
PCT Pub. No. WO2022/162852, PCT Pub. Date Aug. 4, 2022.
Prior Publication US 2024/0012100 A1, Jan. 11, 2024
Int. Cl. G01S 7/03 (2006.01); G01S 13/04 (2006.01)
CPC G01S 7/032 (2013.01) [G01S 13/04 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A radio wave sensor comprising:
a transmission antenna including a plurality of transmission antenna elements to emit a radio wave toward a presence allowable area which is an area in which an occupant is present in an area in a vehicle interior; and
a reception antenna including a plurality of reception antenna elements to receive a reflection wave of the radio wave emitted from the transmission antenna, wherein
positions of at least some of the plurality of transmission antenna elements are arranged at least in one direction between a vehicle height direction and a vehicle width direction, and
positions of at least some of the plurality of reception antenna elements are arranged at least in other direction different from the one direction between the vehicle height direction and the vehicle width direction,
wherein the radio wave sensor is configured to be attached to the vehicle interior such that a first end closer to a front end of the vehicle is located lower than a second end closer to a rear end of the vehicle, and
a position of at least one of the plurality of transmission antenna elements located closer to the second end is higher than a position of another one of the plurality of transmission antenna elements located closer to the first end when attached to the vehicle.