The invention relates to a
digital array radar amplitude-phase monitoring and calibration method based on an
optical fiber delay system. The method mainly includes the steps that a
radar array front
array element and an array front monitoring coupled
array element are utilized to collect amplitude-phase data of all uplink channels and all downlink channels of the
radar array front
array element in a mutual
coupling mode, amplitude-phase monitoring of all the uplinks and the downlinks of a radar array front is finished, when amplitude-
phase correction and calibration need to be conducted on the array front, the difference value between the amplitude-phase data and factory data is acquired through amplitude-phase monitoring, and then amplitude-phase calibration of the uplinks and the downlinks of the array front is finished after the difference value is corrected. According to the method, the
optical fiber delay system is introduced to separate transmitting time from receiving time, within a transmitting monitoring
operation time sequence, the monitored channels work in a deep blanking state,
optical fiber amplitude-phase drifting self-calibration is finished, and accuracy of monitored data is guaranteed. The method has the advantages of being good in real-time performance, convenient and quick to operate, and good in
cost performance. The presentation and
engineering realization of the method have high practical application value in the field of
digital array radar monitoring and calibration.