US RE50,969 E1Granted

Radar device

AssigneePanasonic Automotive Systems Co., Ltd.

InventorsTakaaki Kishigami, Junji Sato

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Abstract

A plurality of transmission antennas include Nt1 transmission antennas arranged in a first direction and Nt2 transmission antennas arranged in a second direction orthogonal to the first direction, a plurality of reception antennas include Na1 reception antennas arranged in the first direction and Na2 reception antennas arranged in the second direction. In the first direction, an inter-element space between any two of the Nt1 transmission antennas and an inter-element space between any two of the Na1 reception antennas are each a value which is a product of a first space and an integer and are all values different from each other, and in the second direction, an inter-element space between any two of the Nt2 transmission antennas and an inter-element space between any two of the Na2 reception antennas are each a value which is a product of a second space and an integer and are all values different from each other.

Claims28

Dependent claims

A radar device comprising:

a radar transmitter which, in operation, transmits a plurality of radar signals at predetermined transmission cycles from a plurality of transmission antennas;
and
a radar receiver which, in operation, receives a plurality of reflected wave signals being the plurality of radar signals reflected on a target, by using a plurality of reception antennas, wherein
the plurality of transmission antennas include Nt1 transmission antennas arranged in a first direction and Nt2 transmission antennas arranged in a second direction orthogonal to the first direction,
the plurality of reception antennas include Na1 reception antennas arranged in the first direction and Na2 reception antennas arranged in the second direction,
in the first direction, each of distances between adjacent two of the Nt1 transmission antennas and adjacent two of the Na1 reception antennas is an integer multiple of a first distance, and all of the distances between the adjacent two of the Nt1 transmission antennas and the adjacent two of the Na1 reception antennas are different from each other, and
in the second direction, each of distances between adjacent two of the Nt2 transmission antennas and adjacent two of the Na2 reception antennas is an integer multiple of a second distance, and all of the distances between the adjacent two of the Nt2 transmission antennas and the adjacent two of the Na2 reception antennas are different from each other.

4 more elements

A radar device comprising:

a radar transmitter which, in operation, transmits radar signals at a predetermined transmission cycle from a first transmission antenna, a second transmission antenna, and a third transmission antenna;
and
a radar receiver which, in operation, receives reflected wave signals being the radar signals reflected on a target, by using a first reception antenna, a second reception antenna, a third reception antenna, and a fourth reception antenna,
wherein:
the first transmission antenna is separated from the second transmission antenna in a first direction at a first distance,
the third transmission antenna is separated from the first and the second transmission antennas in a second direction at a second distance different from the first distance,
the first and the second reception antennas are separated in the first direction at a third distance,
the second and the third reception antennas are separated in the first direction at a fourth distance different from the third distance,
the fourth reception antenna is separated from the first, the second and the third reception antennas in the second direction at a fifth distance different from the fourth distance,
in the first direction, the first distance, the third distance, the fourth distance, and the fifth distance are different from each other,
in the first direction, each of distances between adjacent two of the first transmission antenna, the second transmission antenna, and the third transmission antenna and adjacent two of the first reception antenna, the second reception antenna, the third reception antenna, and the fourth reception antenna is an integer multiple of a first distance, and all of the distances between the adjacent two of the first transmission antenna, the second transmission antenna, and the third transmission antenna and the adjacent two of the first reception antenna, the second reception antenna, the third reception antenna, and the fourth reception antenna are different from each other,
in the second direction, each of distances between adjacent two of the first transmission antenna, the second transmission antenna, and the third transmission antenna and adjacent two of the first reception antenna, the second reception antenna, the third reception antenna, and the fourth reception antenna is an integer multiple of a second distance, and all of the distances between the adjacent two of the first transmission antenna, the second transmission antenna, and the third transmission antenna and the adjacent two of the first reception antenna, the second reception antenna, the third reception antenna, and the fourth reception antenna are different from each other,
the first distance is an aperture length in the first direction of the radar transmitter,
the first distance differs from a sum of the third and fourth distances,
the third and fourth distances are an aperture lengths in the first direction of the radar receiver,
the second distance is an aperture length in the second direction of the radar transmitter,
in the second direction, the second distance is different from the fifth distance, and
the fifth distance is an aperture length in the second direction of the radar receiver.

15 more elements

A radar device comprising:

a radar transmitter which, in operation, transmits radar signals at predetermined transmission cycles from transmission antennas;
and
a radar receiver which, in operation, receives reflected wave signals being the radar signals reflected on a target, by using reception antennas, wherein
the transmission antennas include Nt1 transmission antennas arranged in a first direction and Nt2 transmission antennas arranged in a second direction orthogonal to the first direction, Nt1 being an integer greater than or equal to 1, and Nt2 being an integer greater than or equal to 1,
the reception antennas include Na1 reception antennas arranged in the first direction and Na2 reception antennas arranged in the second direction, Na1 being an integer greater than or equal to 1, and Na2 being an integer greater than or equal to 1,
in the first direction, each of distances between adjacent two of the Nt1 transmission antennas and distances between adjacent two of the Na1 reception antennas is an integer multiple of a first distance, and all of the distances between the adjacent two of the Nt1 transmission antennas and all of the distances between the adjacent two of the Na1 reception antennas are different from each other,
in the second direction, each of distances between adjacent two of the Nt2 transmission antennas and distances between adjacent two of the Na2 reception antennas is an integer multiple of a second distance, and
all of the distances between the adjacent two of the Nt2 transmission antennas and all of the distances between the adjacent two of the Na2 reception antennas are different from each other.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/217,419Filed 30 Jun 2023 · continuation
Priority: JP 2015-18405517 Sep 2015
Granted: 28 Jul 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

G01S 7/28
Of systems according to group G01S13/00: details of pulse systems
G01S 13/325
Using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated: using transmission of coded signals,…
H01Q 21/061
Arrays of individually energised antenna units similarly polarised and spaced apart: two dimensional planar arrays
H01Q 25/00
Antennas or antenna systems providing at least two radiating patterns

Family

Application15/256,509Reissue · filed 2 Sep 2016
US 10,371,796 B2Reissue · filed 6 Aug 2019
Application17/394,286Parent of this continuation · filed 4 Aug 2021
US RE49,619 E1Parent of this continuation
Application17/394,286Reissue
US 2017/0082730 A1Published application
US RE50,969 E1This patent

From the US filing history. Foreign family members aren’t listed.