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公开(公告)号：US20220187440A1
公开(公告)日：2022-06-16
申请号：US17544345
申请日：2021-12-07
Inventor： Takaaki KISHIGAMI
Abstract: A radar transmitter includes: a plurality of transmission antennas that transmit a transmission signal; and a transmission circuit that applies a phase rotation amount corresponding to a Doppler shift amount and a code sequence to the transmission signal to perform multiplexing transmission of the transmission signal from the plurality of transmission antennas. Each of the plurality of transmission antennas is associated with each of a plurality of combinations of the Doppler shift amount and the code sequence. Each of the plurality of combination is different at least one of the Doppler shift amount and the code sequence, and the Doppler shift amounts of those of the plurality of combinations which are associated respectively with at least two transmission antennas of the plurality of transmission antennas are the same Doppler shift amount, the at least two transmission antennas being a first sub-array antenna.
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公开(公告)号：US20220171048A1
公开(公告)日：2022-06-02
申请号：US17532843
申请日：2021-11-22
Inventor： Takaaki KISHIGAMI
IPC: G01S13/34 , G01S13/931 , G01S7/02 , G01S7/35
Abstract: The radar apparatus includes: a plurality of transmission antennas that transmit a transmission signal; and a transmission circuit that applies a phase rotation amount corresponding to a Doppler shift amount and a code sequence to the transmission signal to perform multiplexing transmission of the transmission signal from the plurality of transmission antennas. A transmission delay of the transmission signal is set for a transmission period of the transmission signal. Each of the plurality of transmission antennas is associated with a combination of the Doppler shift amount and the code sequence such that at least one of the Doppler shift amount and the code sequence is different between a plurality of the combinations. A number of multiplexing by the code sequence corresponding to a first Doppler shift amount is different from a number of multiplexing by the code sequence corresponding to a second Doppler shift amount.
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公开(公告)号：US20220163623A1
公开(公告)日：2022-05-26
申请号：US17439682
申请日：2020-02-14
Inventor： Takaaki KISHIGAMI , Kenta IWASA , Hidekuni YOMO
IPC: G01S7/03 , H01Q21/06 , H04B7/0413 , G01S13/44
Abstract: Each of the plurality of transmission antenna groups includes a plurality of transmission antennas that are disposed at second intervals in a first direction, and are disposed at fourth intervals each of which is an interval of an integral multiple of a third interval in a second direction. Each of the plurality of reception antenna groups includes a plurality of reception antennas that are disposed at fifth intervals in the first direction, and are disposed at sixth intervals each of which is an interval of an integral multiple of the third interval in the second direction. The difference between the second interval and the fifth interval is the first interval, and the difference between the fourth interval and the sixth interval is the third interval.
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公开(公告)号：US20220120849A1
公开(公告)日：2022-04-21
申请号：US17500808
申请日：2021-10-13
Inventor： Takaaki KISHIGAMI
Abstract: Reception antennas include first antennas at positions different in a first direction, second antennas at positions different in a second direction perpendicular to the first direction, and a third antenna different from the first or second antenna. The first and second antennas include one overlapping antenna. The third antenna is arranged at a position different in the second direction from a position of the first antennas. The third antenna is arranged at a position a prescribed spacing apart in the first direction from a position of the second antennas. At least one spacing of the first antennas is the prescribed spacing. Transmission antennas include fourth antennas arranged in the first direction and fifth antennas arranged in the second direction. The fourth antennas and the fifth antennas include one overlapping antenna. A spacing of the fourth antennas is wider in the first direction than an aperture length of the first antennas.
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公开(公告)号：US20210184367A1
公开(公告)日：2021-06-17
申请号：US17184126
申请日：2021-02-24
Inventor： Takaaki KISHIGAMI
Abstract: A transmitting array antenna includes a second antenna group placed in a position inside a first antenna group in a first direction and a position different from the first antenna group in a second direction. A receiving array antenna includes a fourth antenna placed in a position outside a third antenna group arranged in the first direction and a position different from the third antenna group in the second direction. An interelement spacing between a receiving antenna of the third antenna group located at an end on a second side is identical to an interelement spacing in the first direction between a transmitting antenna of the first antenna group on the first side and each of the second antenna group. In a case where the first antenna group and the third antenna group are identical in position in the second direction, positions of antennas are different.
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Patent Agency Ranking
公开(公告)号：US20200096595A1
公开(公告)日：2020-03-26
申请号：US16580032
申请日：2019-09-24
Inventor： Takaaki KISHIGAMI
Abstract: Radar receiver calculates a first reception power in each of a predetermined number of beam directions by using a reflected wave signal in a first cell among a plurality of cells into which a region represented by at least one of a distance component and a Doppler frequency component is divided, calculates a second reception power on the basis of reception powers of reception array antennae by using the reflected wave signal in a peripheral cell of the first cell among the plurality of cells, and determines whether or not a target is present in the first cell on the basis of a comparison result between the first reception power and a first threshold value that is a value obtained by multiplying the second reception power by a first coefficient.
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公开(公告)号：US20240192349A1
公开(公告)日：2024-06-13
申请号：US18581876
申请日：2024-02-20
Inventor： Takaaki KISHIGAMI , Ryosuke SHIOZAKI , Hidekuni YOMO , Kenta IWASA
CPC classification number: G01S13/343 , G01S7/4026 , G01S7/403 , G01S7/4034 , G01S2013/0245
Abstract: A radar device includes: a control circuit which, in operation, selects at least one of a plurality of transmission antennas in each of determined transmission periods; and a plurality of transmission circuits which, in operation, transmit at least one transmission signal in every transmission period using the selected at least one of the plurality of transmission antennas. The control circuit, in operation, selects a first transmission antenna of the plurality of transmission antennas once in the determined transmission periods, and selects remaining second transmission antennas of the plurality of transmission antennas a plurality of times in the determined transmission periods.
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公开(公告)号：US20240192315A1
公开(公告)日：2024-06-13
申请号：US18407730
申请日：2024-01-09
Inventor： Takaaki KISHIGAMI , Junji SATO
IPC: G01S7/35 , G01S7/03 , G01S13/931
CPC classification number: G01S7/356 , G01S7/032 , G01S13/931
Abstract: In a radar apparatus, either a plurality of transmission antennas or a plurality of reception antennas include a first antenna group disposed in a first direction and a second antenna group disposed in a second direction different from the first direction, and an other of the plurality of transmission antennas and the plurality of reception antennas include a third antenna group disposed in a third direction different from each of the first direction and the second direction.
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公开(公告)号：US20230059058A1
公开(公告)日：2023-02-23
申请号：US17875101
申请日：2022-07-27
Inventor： Takaaki KISHIGAMI
IPC: G01S13/58
Abstract: Provided is a radar apparatus that detects a target object with high accuracy. The radar apparatus includes: transmission circuitry, which, in operation, alternately outputs a first transmission signal with a first central frequency and a second transmission signal with a second central frequency higher than the first central frequency for each transmission period; and one or a plurality of transmission antennas, which, in operation, transmit the fast transmission signal and the second transmission signal. The second central frequency is higher than a frequency (1+1/Nc) times the first central frequency, where Nc is an integer indicating a number of times of transmission of each of the first transmission signal and the second transmission signal for the each transmission period within a predetermined duration.
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公开(公告)号：US20220107402A1
公开(公告)日：2022-04-07
申请号：US17553370
申请日：2021-12-16
Inventor： Takaaki KISHIGAMI
IPC: G01S13/58
Abstract: A radar apparatus includes: a plurality of transmission antennas that each transmit a transmission signal; and a radar transmitter that applies a Doppler shift amount to the transmission signal transmitted from each of the plurality of transmission antennas. A plurality of the Doppler shift amounts have intervals set by unequally dividing a Doppler frequency range subject to Doppler analysis.
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