Abstract: A new technique to suppress the VCO nonlinearity by resampling the measured IF s ignal in short range frequency modulated continuous wave (FM/CW) radar based on a known reflecting reference is presented, which caused intentionally by a spec ially fabricated splash plate paraboloidal antenna. The basic principle and spe cial attentions are given in following discussion. Moreover, a confirmed experim ent in microwave non reflective chamber is simulated. The result shows the feas ibility of our self made antenna and the result is satisfactorily.