A Calibration Method for Radar Receiver Channel Array

A technology of receiving channels and calibration methods, applied in radio wave measurement systems, instruments, etc., can solve problems such as unsatisfactory calibration results, achieve stable and reliable calibration results, and overcome gain inconsistency.
CN104297736BActive Publication Date: 2017-01-11CNGC INST NO 206 OF CHINA ARMS IND GRP
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
CNGC INST NO 206 OF CHINA ARMS IND GRP
Publication Date
2017-01-11

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Abstract

The invention relates to a correction method for a radar receiving channel array. According to the method, the amplitudes and phase data of the receiving channel array at multiple angles are firstly recorded, and then amplitude and phase correction is carried out. The amplitude correction value is obtained through the method of averaging amplitude measurement values of the multiple angles. According to the calculation of the phase correction value, a phase reference channel is selected firstly, the theoretical phase deviation value of the reference channel is subtracted from the phase measurement value of each angle, bad values are removed, the residual data are averaged, then the phase deviation value is obtained, and the phase correction value is further obtained.
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Description

technical field

[0001] The invention relates to a correction method for a radar receiving channel array, which belongs to the field of signal and signal processing. Background technique

[0002] A phased array radar antenna system generally includes multiple receiving channels. Since it is difficult to ensure that the electrical characteristics of all channels are consistent during the production process, this will cause differences in parameters such as bandwidth, gain, phase, delay characteristics, and noise figure of each channel. So when the same signal enters the channel, each channel will produce a different output signal. This will affect the beam shape after digital beamforming (DBF) of phased array radar, and directly affect the angle measurement accuracy of the target; at the same time, the inconsistency between channels will increase the sidelobe level, thereby reducing the signal detection capability of the radar. Therefore, in the application of phased array ra...

Claims

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