极化对雷达旁瓣对消和旁瓣匿影的影响

Influence of Polarization on Radar Sidelobe Cancellation and Sidelobe Blanking

极化失配、极化时变会引起雷达接收信号能量损失和畸变,严重影响雷达旁瓣对消和旁瓣匿影的抗扰效果,文中建立了主辅天线阵接收极化模型,仿真分析了极化失配对对消比和匿影逻辑的影响,区分脉组间变化、脉间变化、脉内变化三种情况,仿真分析了干扰极化时变对对消时序和匿影逻辑的影响,给出了极化对旁瓣对消和旁瓣匿影影响的结论。

Polarization mismatch and polarization time-varying will cause energy loss distortion of radar received signal,which will seriously affect the anti-jamming effect of radar sidelobe cancellation and sidelobe blanking.This paper establishes the polarization model of main and auxiliary antenna array,simulates and analyzes the influence of polarization mismatch on cancellation ratio and blanking logic,and distinguishes between pulse groups,between pulse changes,and within pulse changes,the influence of interference polarization time-varying on cancellation timing and blanking logic is simulated and analyzed.Finally,the conclusion of the influence of polarization on radar sidelobe cancellation and sidelobe blanking is given.