US 12,078,746 B2
Radar apparatus
Takaaki Kishigami, Tokyo (JP)
Assigned to Panasonic Automotive Systems Co., Ltd., Kanagawa (JP)
Filed by Panasonic Automotive Systems Co., Ltd., Kanagawa (JP)
Filed on Oct. 13, 2021, as Appl. No. 17/500,808.
Claims priority of application No. 2020-174017 (JP), filed on Oct. 15, 2020.
Prior Publication US 2022/0120849 A1, Apr. 21, 2022
Int. Cl. G01S 7/03 (2006.01); G01S 13/42 (2006.01); H01Q 21/06 (2006.01); H01Q 21/28 (2006.01); G01S 7/285 (2006.01); G01S 13/06 (2006.01); G01S 13/32 (2006.01); G01S 13/34 (2006.01); G01S 13/44 (2006.01); G01S 13/58 (2006.01); G01S 13/931 (2020.01)
CPC G01S 7/032 (2013.01) [G01S 13/42 (2013.01); H01Q 21/065 (2013.01); H01Q 21/28 (2013.01); G01S 7/285 (2013.01); G01S 13/06 (2013.01); G01S 13/325 (2013.01); G01S 13/343 (2013.01); G01S 13/44 (2013.01); G01S 13/449 (2013.01); G01S 13/584 (2013.01); G01S 13/931 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A radar apparatus comprising:
transmission circuitry, which, in operation, transmits a transmission signal by using a plurality of transmission antennas; and
reception circuitry, which, in operation, receives a reflected wave signal that is the transmission signal reflected from an object by using a plurality of reception antennas, wherein
either one of the plurality of transmission antennas or the plurality of reception antennas includes a plurality of first antennas arranged at different positions in a first direction, a plurality of second antennas arranged at different positions in a second direction perpendicular to the first direction, the plurality of first antennas arranged at the same position in the second direction and the plurality of second antennas arranged at the same position in the first direction, and a third antenna different from any of the plurality of first antennas and the plurality of second antennas,
one of the plurality of first antennas constitutes one of the plurality of second antennas,
the third antenna is arranged at a first spacing in the first direction from the position of the plurality of second antennas, and is arranged at a second spacing in the second direction from the position of the plurality of first antennas,
a first aperture length of the plurality of first antennas in the first direction is greater than the first spacing, or a second aperture length of the plurality of second antennas in the second direction is greater than the second spacing,
the first spacing is an integer multiple of at least one spacing of the plurality of first antennas, and the second spacing is an integer multiple of at least one spacing of the plurality of second antennas,
the other one of the plurality of transmission antennas or the plurality of reception antennas includes a plurality of fourth antennas arranged in the first direction, and a plurality of fifth antennas arranged in the second direction, the plurality of fourth antennas arranged at the same position in the second direction and the plurality of fifth antennas arranged at the same position in the first direction, and
one of the plurality of fourth antennas constitutes one of the plurality of fifth antennas.