公开(公告)号：US11885909B2

公开(公告)日：2024-01-30

申请号：US16997605

申请日：2020-08-19

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Takuya Maekawa ,  Atsuyuki Yuasa ,  Kazunari Kawahata

IPC: G01S7/41 ,  G01S7/02 ,  G01S7/35 ,  G01S13/42 ,  G01S13/931

CPC classification number: G01S7/411 ,  G01S7/025 ,  G01S7/354 ,  G01S7/418 ,  G01S13/42 ,  G01S13/931

Abstract: Provided is an object shape detection apparatus that can detect the shape of a raised or depressed portion on the surface of an object. In accordance with a comparison result obtained by a reflection intensity comparator with regard to intensity of a horizontally polarized wave component and a vertically polarized wave component of a reflected wave, the object shape determiner detects the shape of the raised portion and the shape of the depressed portion of a detection target object. The object locator detects the position of the raised portion and the position of the depressed portion of the detection target object by measuring the distance to the raised portion and the distance to the depressed portion of the detection target object detected by the object shape determiner.

公开(公告)号：US11231483B2

公开(公告)日：2022-01-25

申请号：US16808640

申请日：2020-03-04

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Katsuhisa Kashiwagi ,  Atsuyuki Yuasa

IPC: G01S7/35 ,  G01S13/58 ,  G01S13/931

Abstract: A radar apparatus and an automobile including the radar apparatus are provided. The radar apparatus may measure the elevation/declination angle of a target with high accuracy by using simple circuits at low cost without use of a detection circuit and an AD conversion circuit having high time resolution. A transmit antenna transmits transmit signal waves modulated through the multilevel FSK, and receive antennas receive reflected waves obtained by reflecting, off a target, the transmit signal waves which return. The multilevel FSK is used as a modulation method so that the beat frequency between the receive signal waves from the target and the transmit signal waves serves as the Doppler frequency. Thus, the elevation/declination angle φ of the target is calculated by a computing unit, not from the frequencies of the receive signal waves as in the related art, but from the frequency of the transmit signal waves.

公开(公告)号：US09859948B2

公开(公告)日：2018-01-02

申请号：US14788918

申请日：2015-07-01

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Makoto Yasutake ,  Atsuyuki Yuasa

IPC: H04L27/20 ,  H04B1/69 ,  H04B1/707 ,  H04B1/02 ,  H04L27/00

CPC classification number: H04B1/69 ,  H04B1/02 ,  H04B1/707 ,  H04L27/20 ,  H04L27/2035 ,  H04L2027/0018 ,  H04L2027/0051 ,  H04L2027/0083

Abstract: A microprocessor includes a memory, an input/output port and a switch controller. Transmission data, a spread code and an inverted code are stored in the memory. The switch controller generates a spread spectrum signal by calling up either of the spread code or the inverted code in accordance with a bit of the transmission data. A switch connected to the input/output port is switched on and off based on the spread spectrum signal. In addition, an antenna is connected to the input/output port via a coupler. An oscillation circuit includes a reference oscillator and a BPF and inputs a harmonic of a reference signal to the coupler as a carrier wave.

公开(公告)号：US09739871B2

公开(公告)日：2017-08-22

申请号：US14681163

申请日：2015-04-08

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hidenori Obiya ,  Ryuken Mizunuma ,  Shinya Mizoguchi ,  Atsuyuki Yuasa ,  Shinya Hitomi ,  Hisao Hayafuji

IPC: G01S13/02 ,  G01S7/02 ,  H04B1/525 ,  G01S7/03

CPC classification number: G01S7/02 ,  G01S7/038 ,  G01S13/02 ,  H04B1/525

Abstract: A reflected signal detector (12) detects the amplitude and the phase of a reflected signal and outputs detection signals. A control circuit (13) adjusts first control signals and second control signals on the basis of the detection signals. A first cancel signal output portion (9) adjusts a first cancel signal so that the first cancel signal has a phase opposite to that of the reflected signal and has the same amplitude as that of the reflected signal using the first control signals. A second cancel signal output portion (10) adjusts a second cancel signal so that the second cancel signal has a phase opposite to that of a leakage signal and has the same amplitude as that of the leakage signal using the second control signals. A combining portion (11) combines a reception signal including noise signals with the first and second cancel signals.