收发隔离度一直是制约干扰机效能发挥的重要因数,若隔离度不够,发射的干扰信号会耦合到侦收端口,使接收机不能正常工作甚至产生自激。自卫式干扰机可以采用示样转发的方法来解决收发隔离问题,由于示样干扰与雷达脉冲严重失配,干扰信号的脉压得益很低。文中对普通示样转发信号和污染谱示样转发信号的干扰效果进行了分析,找出了普通示样转发信号能够产生稳定虚假点迹的边界条件,对于自卫式干扰机的干扰波形和时序设计有一定的指导意义。

Transmitter-receiver isolation is forever an important factor to limit the jammer's effectiveness. The jamming signals radiated by the transmitter are probably coupled into the receiver without enough isolation, which make the receiver abnormal or selfexcited. The interference pattern based on sampled pulses, namely, the sample-jamming (SJ) is usually employed in self-protection jammer (SPJ) to achieve enough isolation. Whereas, the mismatching between SJ signals and radar signals makes that the pulse-compression gain of SJ signals is dramatically lower than that of radar signals. The efficiency analysis of ordinary SJ and SJ based on smear spectrum is proposed in this paper. The boundary conditions of the stable fake trace generated by ordinary SJ are given as well. The results are of importance for the design of the jamming waveform and schedule in SPJ.

TN972