Multi-channel digital beam phased-array antenna calibration system and method

The invention discloses a multi-channel digital beam phased-array antenna calibration system, which comprises a digital beam receiving and forming unit used for performing one-stage or multi-stage down-conversion, sampling and software processing on a radio frequency signal to form a digital beam directional diagram; the digital beam antenna test control unit is used for controlling the working state of the multi-channel phased-array antenna and generating a synchronizing signal and a control signal required by the test; the invention also discloses a multi-channel digital beam phased-array antenna calibration method. The method comprises the following steps: S1, antenna erection and preheating; s2, matrix switch calibration; s3, antenna far-field calibration; s4, testing an antenna far-field pattern; and S5, forming and outputting a wave beam. In the invention, the multi-channel digital beam phased-array antenna calibration system completes amplitude-phase calibration of the antenna before and after the ante