Multichannel phased-array antenna transmit-receive time delay real-time self-calibration method

The invention discloses a multi-channel phased-array antenna transmit-receive time delay real-time self-calibration method, and relates to the field of phased-array antenna calibration, and the method comprises the steps: firstly, carrying out the sub-array division of a phased-array antenna array plane, and enabling each antenna sub-array to correspond to a transmit-receive channel; then, respectively forming closed loops between the two antenna sub-arrays and between the two antenna sub-arrays and the calibration channel by switching the working states of the two antenna sub-arrays to be calibrated and the calibration channel, and carrying out time delay measurement; according to a time delay measurement result, calculating time delays of receiving and transmitting channels of the two antenna sub-arrays; comparing the time delays of the transmitting and receiving channels before and after the two antenna sub-arrays work in real time, and calibrating the variation of the time delays of the transmitting and r