Marine Doppler velocity measurement radar transmit-receive assembly

The utility model discloses a marine Doppler velocity measurement radar transmit-receive assembly comprising a housing, a transmitting channel and a receiving channel. A transmitting input port, a transmitting output port, a receiving echo input waveguide port, a zero-frequency signal output port I and a zero-frequency signal output port Q are formed in the surface of the shell; the transmitting channel receives an external excitation signal through the transmitting input port and divides the external excitation signal into two paths of signals, one path of signal serves as a local oscillator signal of the receiving channel, and the other path of signal is transmitted through the transmitting output port; and the receiving channel receives an echo signal generated by the other path of signal through a receiving echo input waveguide port, performs frequency mixing on the echo signal and the local oscillator signal to obtain two paths of zero-frequency signals with a phase difference of 90 degrees, and outputs