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Vehicle-mounted millimeter wave radar multi-channel array antenna amplitude and phase correction device and method

A technology of millimeter-wave radar and array antenna, which is applied in the direction of measuring device, radio wave measurement system, radio wave reflection/re-radiation, etc., can solve the problem of multi-channel array antenna channel mismatch, etc., and achieve fast correction process and good correction results Testable and easy-to-use effects

Active Publication Date: 2019-04-16
NANJING UNIV OF SCI & TECH
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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a correction device and method for correcting the problem of multi-channel array antenna channel mismatch

Method used

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  • Vehicle-mounted millimeter wave radar multi-channel array antenna amplitude and phase correction device and method
  • Vehicle-mounted millimeter wave radar multi-channel array antenna amplitude and phase correction device and method
  • Vehicle-mounted millimeter wave radar multi-channel array antenna amplitude and phase correction device and method

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Embodiment

[0098] combine figure 1 , A vehicle-mounted millimeter-wave multi-channel array antenna amplitude and phase correction device provided by the present invention includes: a controllable rotary turntable module, a digital processing module, a computer, and an array antenna under test.

[0099] The controllable rotary turntable module includes a two-dimensional turntable and an encoding motor. In this embodiment, the measured array antenna is an equidistant array antenna, and the antenna design spacing is 1.95 mm. The measured array antenna includes 4 receiving antennas and 1 transmitting antenna. , the emission frequency is 76.8GHz, and the wavelength is 3.906mm.

[0100] The digital processing module includes an ADC sampling module and a network interface module, wherein the ADC sampling module is a 12-bit four-channel chip with a sampling rate of 10MHz.

[0101] The computer is used to control the rotation of the encoder motor, receive and process the data transmitted by the ...

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Abstract

The invention discloses a vehicle-mounted millimeter wave radar multi-channel array antenna amplitude and phase correction device and method and belongs to the advanced driving auxiliary system fieldand the millimeter wave detection technology field. The device comprises a controllable rotation turntable module, a tested array antenna, a digital processing module, and a computer. The digital processing module comprises a network interface module and an ADC sampling module. The tested array antenna receives a target echo signal. After AD sampling, the sampling signal sequence of each channel is acquired. Two-dimensional FFT transformation is performed to solve the phase and amplitude of a target in each channel. The phase and amplitude are substituted into an established amplitude and phase correction mathematical model, and the amplitude and phase characteristics of all channels can be corrected to be consistent. Data can be automatically collected, channel correction can be performed, zero angle does not need to be searched before correction, and the device and the method are suitable for a equal-distance array antenna and a non-equidistance array antenna.

Description

technical field [0001] The invention belongs to the field of advanced driving assistance systems and the technical field of millimeter-wave detection, in particular to a device and method for correcting the amplitude and phase of a multi-channel array antenna of a vehicle-mounted millimeter-wave radar. Background technique [0002] In the supply system of advanced driving assistance systems, domestic automakers have a huge demand for sensors at the front-end sensing end, especially the supply of on-board millimeter-wave radars has become their top priority. This is because compared with lidar, millimeter-wave automotive radar has many advantages such as being unaffected by light, long-range, unaffected by weather, low price, and high reliability. The multi-antenna-based array antenna technology can apply the digital wavenumber formation algorithm to solve the azimuth angle between the target and the radar, and provide the necessary angle information for the automobile anti-c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/93G01S7/40
CPCG01S7/40G01S13/931
Inventor 彭树生卞亨通吴礼刘钧肖芸高辉盛俊铭毕业昆彭立尧李玉年
Owner NANJING UNIV OF SCI & TECH
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