关键词: 信号泄漏, 矢量对消, 调频连续波

Abstract:

In view of the 3 mm band frequency modulation continuous wave radar signal leakage problem,an analysis is made of leakage mechanism,based on which the corresponding cancellation techniques are proposed.Cancellation can be realized by proper setting of the amount of coupling between two branches and the amplitude attenuation value,and adjustment of the phase of the cancellation signal by the phase shifter if the reference signal and leakage signal are roughly equal in amplitude,thus reducing the effect of leakage signal on receiver sensitivity.The experimental result and the analysis result is consistent.

Key words: signal leakage;vector cancellation;frequency modulation continuous wave