Abstract: This paper describes a Ku band frequncy synthesizer and receiver which provide transmited excitation signal for radar and receive the echo signal. Using direct sythesis and indirect sythesis for the frequency synthesize of Ku band and DDS for multi-mode digital waveform ,it produces the radar transmitter excitation signal by twice frequency conversion and receives echo sigle by twice down frequency conversion. Utilize CAD and EMC and MCM for the designing of the circuit and structure to achieve integration of Ku-band frequency synthesizer receiver. Testing phase noise of the frequency synthesizer receiver are better than -100dBc/Hz@1kHz,clutter better than -65dBc and gain is 40±1dB.