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公开(公告)号：US11933875B2
公开(公告)日：2024-03-19
申请号：US17202941
申请日：2021-03-16
Inventor： Takaaki Kishigami , Kenta Iwasa
IPC: G01S13/28 , G01S7/02 , G01S7/282 , G01S7/288 , G01S13/931 , H04B7/0413
CPC classification number: G01S13/288 , G01S7/0234 , G01S7/282 , G01S7/2883 , G01S13/282 , G01S13/931 , H04B7/0413
Abstract: The target detection accuracy of a radar apparatus is improved. The radar apparatus includes transmission circuitry, which, in operation, transmits a transmission signal using a plurality of transmit antennas, and reception circuitry, which, in operation, receives using a plurality of receive antennas a reflected wave signal that is the transmission signal reflected by an object, in which the plurality of transmit antennas include at least one first transmit antenna and a plurality of second transmit antennas, and, in a first direction, an absolute value of a difference between, on one hand, a spacing between the at least one first transmit antenna and a phase center of those of the plurality of second transmit antennas which are used for beam synthesis, and, on another hand, a spacing between adjacent receive antennas of the plurality of receive antennas is a defined value based on a wavelength of the plurality of transmission signals.
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公开(公告)号：US11885905B2
公开(公告)日：2024-01-30
申请号：US17479374
申请日：2021-09-20
Inventor： Kenta Iwasa , Hidekuni Yomo , Tomohiro Yui
CPC classification number: G01S7/2921 , G01S7/288 , G01S13/288
Abstract: Provided is a radar apparatus including: an estimation circuit; and a processing circuit. The estimation circuit outputs a plurality of pieces of data each including information in which a distance to a target and a direction to the target are estimated based on a reception signal including a reflected wave that is a radar signal reflected by the target. The processing circuit determines a range side lobe component in the target based on the estimated distance and the estimated direction of one or more pieces of data selected from the plurality of pieces of data.
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公开(公告)号：US11762088B2
公开(公告)日：2023-09-19
申请号：US17870383
申请日：2022-07-21
Inventor： Takaaki Kishigami , Kenta Iwasa , Hidekuni Yomo
IPC: G01S13/93 , G01S7/03 , G01S13/53 , G01S7/02 , G01S13/931 , G01S13/534
CPC classification number: G01S13/931 , G01S7/036 , G01S13/534 , G01S7/023
Abstract: A radar apparatus includes a plurality of transmit antennas that transmits a plurality of transmission signals using a multiplexing transmission, and a transmission circuit that applies phase rotation amounts corresponding to combinations of Doppler shift amounts and code sequences to the plurality of transmission signals. Each of the plurality of transmission signals is assigned a different combination among the combinations. The combinations include at least one combination of different numbers of multiplexing by the code sequences.
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公开(公告)号：US12072409B2
公开(公告)日：2024-08-27
申请号：US18481854
申请日：2023-10-05
Inventor： Kenta Iwasa , Hidekuni Yomo
IPC: G01S13/00 , G01S7/03 , G01S7/282 , G01S7/285 , G01S13/42 , G01S13/87 , G01S13/931 , H01Q1/32 , H01Q3/26 , H01Q21/06 , H01Q21/29
CPC classification number: G01S13/003 , G01S7/03 , G01S7/032 , G01S7/282 , G01S7/285 , G01S13/42 , G01S13/878 , H01Q1/3233 , H01Q3/2605 , H01Q21/061 , H01Q21/293 , G01S13/931
Abstract: One of a transmitting array antenna and a receiving array antenna includes a first antenna group and a second antenna group. The first antenna group includes one or more first antenna elements of which the phase centers of the antenna elements are laid out at each first layout spacing following a first axis direction, and a shared antenna element. The second antenna group includes a plurality of second antenna elements and the one shared antenna element, and the phase centers of the antenna elements are laid out in two columns at each second layout spacing following a second axis direction that is different from the first axis direction. The phase centers of the antenna elements included in each of the two columns differ from each other regarding position in the second axis direction.
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Patent Agency Ranking
公开(公告)号：US11874391B2
公开(公告)日：2024-01-16
申请号：US17208226
申请日：2021-03-22
Inventor： Hidekuni Yomo , Tomohiro Yui , Kenta Iwasa , Junji Sato
IPC: G01S7/03
CPC classification number: G01S7/038
Abstract: Performance of a radar apparatus including a plurality of transceiver ICs is improved. The radar apparatus includes: a plurality of integrated circuit, which, in operation, perform signal processing on a received signal; and a signal processing circuit, which, in operation, compensates for a deviation between the plurality of integrated circuits based on a difference between leak radio wave components received by receive antennas corresponding respectively to the plurality of integrated circuits.
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公开(公告)号：US11635506B2
公开(公告)日：2023-04-25
申请号：US17507564
申请日：2021-10-21
Inventor： Kenta Iwasa , Hidekuni Yomo
IPC: G01S13/00 , G01S7/03 , G01S7/282 , G01S7/285 , G01S13/42 , H01Q1/32 , H01Q21/06 , H01Q21/29 , G01S13/87 , H01Q3/26 , G01S13/931
Abstract: One of a transmitting array antenna and a receiving array antenna includes a first antenna group and a second antenna group. The first antenna group includes one or more first antenna elements of which the phase centers of the antenna elements are laid out at each first layout spacing following a first axis direction, and a shared antenna element. The second antenna group includes a plurality of second antenna elements and the one shared antenna element, and the phase centers of the antenna elements are laid out in two columns at each second layout spacing following a second axis direction that is different from the first axis direction. The phase centers of the antenna elements included in each of the two columns differ from each other regarding position in the second axis direction.
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公开(公告)号：US11448725B2
公开(公告)日：2022-09-20
申请号：US16584278
申请日：2019-09-26
Inventor： Kenta Iwasa , Hidekuni Yomo
Abstract: To provide an improved radar apparatus capable of expanding the aperture length per antenna element and the aperture length of the virtual reception array antenna. One of a transmission array antenna and a reception array antenna includes a first antenna element group having m-pieces of antenna elements arranged at a first interval Dt along a first axis direction (m is an integer of 1 or larger), and the other one of the transmission array antenna and the reception array antenna includes a second antenna element group having (n+1)-pieces of antenna elements arranged at a second interval Dr(n) along the first axis direction (n is an integer of 1 or larger).
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公开(公告)号：US11428805B2
公开(公告)日：2022-08-30
申请号：US16898856
申请日：2020-06-11
Inventor： Takaaki Kishigami , Kenta Iwasa , Hidekuni Yomo
IPC: G01S13/93 , G01S7/03 , G01S13/53 , G01S7/02 , G01S13/931 , G01S13/534
Abstract: Radar transmitter includes a plurality of transmit antennas that transmit a plurality of transmission signals using a multiplexing transmission, and a transmission circuit. The transmission circuit applies phase rotation amounts corresponding to combinations of Doppler shift amounts and code sequences to the plurality of transmission signals. Each of the combinations of the Doppler shift amounts and the code sequences has at least one different from other combination. The number of multiplexes of the code sequence corresponding to at least one of the Doppler shift amounts in the combinations is different from the number of multiplexing of code sequences corresponding to the remaining Doppler shift amounts.
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公开(公告)号：US11187795B2
公开(公告)日：2021-11-30
申请号：US16289127
申请日：2019-02-28
Inventor： Kenta Iwasa , Hidekuni Yomo
IPC: G01S13/00 , G01S7/03 , G01S7/282 , G01S7/285 , G01S13/42 , H01Q1/32 , H01Q21/06 , H01Q21/29 , G01S13/87 , H01Q3/26 , G01S13/931
Abstract: One of a transmitting array antenna and a receiving array antenna includes a first antenna group and a second antenna group. The first antenna group includes one or more first antenna elements of which the phase centers of the antenna elements are laid out at each first layout spacing following a first axis direction, and a shared antenna element. The second antenna group includes a plurality of second antenna elements and the one shared antenna element, and the phase centers of the antenna elements are laid out in two columns at each second layout spacing following a second axis direction that is different from the first axis direction. The phase centers of the antenna elements included in each of the two columns differ from each other regarding position in the second axis direction.
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