FM-CW (Frequency Modulated Continuous Wave) intermediate frequency signal processing device

Disclosed is an FM-CW (Frequency Modulated Continuous Wave) intermediate frequency signal processing device. A radio frequency signal is sent to a baseline processor so as to eliminate the error of the radio frequency signal; the processed radio frequency signal and a local oscillator signal are sent to a balanced mixer; the balanced mixer is formed by a mixer, a radio frequency choking coil, a diode and a band-pass filter; an obtained intermediate frequency signal is sent to an intermediate frequency amplifier through the balanced mixer, the processed signal is sent to an amplitude limiting processor through the intermediate frequency amplifier, and an intermediate frequency echo signal which meets the need is output through the amplitude limiting processor finally. According to the FM-CW intermediate frequency signal processing device, the echo signal of a radio altimeter can be simulated truly and the important effect on the verification on the static and dynamic characteristics of the radio altimeter is achieved.