Radar receiving channel calibration method based on monopole crossed loop antenna
A receiving channel and calibration method technology, which is applied in the field of radar receiving channel calibration based on monopole cross-loop antennas, can solve the problems of low efficiency, radar channel characteristic changes, laborious and laborious, etc., and achieve convenient operation, strong autonomy, and measurement high precision effect
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[0096] figure 2 Overall block diagram for radar receiver channel calibration. During the channel calibration process, keep the positions of the transmitting and receiving antennas unchanged, and perform calibration according to the following steps:
[0097] 1) Initialize settings. Adjust the normal direction of the receiving antenna so that it points to the transmitting antenna; reduce the transmitting power by about 50dB (the specific value is appropriate to ensure that the direct wave signal is within the dynamic range of the receiver, or directly connect the signal at the input end of the power amplifier to the transmitting antenna), At the same time, modify the radar waveform parameters so that the transmit and receive windows partially overlap (the overlapping pulse width is not strictly required); under the condition of keeping the frequency of the transmit signal unchanged, modify the frequency of the received local oscillator signal so that there is a certain frequency
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