The transmitting channel is mainly composed of the receiving channel and the transmitting channel. The transmitter channel mainly performs the functions of filtering, amplifying, up-converting, filtering, driving and amplifying, power amplifying, filtering and outputting the low frequency signal. amplification, power amplification, filtering, output and other functions. The receive channel mainly implements the input RF signal down-conversion, filtering, AGC gain dynamic control, etc. The receiver and transmitter are equipped with separate local oscillators.