最佳极化在雷达检测中的得益分析

摘要

最佳极化发射和接收是增大隐身目标RCS,提高雷达对隐身目标检测概率的有效方法.通过对目标RCS与雷达发射极化方式内在规律的研究,指出RCS与发射极化方式满足余弦关系,基于该规律提出一种提取最佳极化的新方法.仿真对比了不同发射极化方式下的目标动态RCS,并利用Swerling I检测模型研究最佳极化在雷达检测中的得益.仿真结果表明,采用最佳极化收发,隐身目标RCS得益最大可达30 dB,雷达对隐身目标检测概率得益最大可达0.5.仿真结果也证明了该提取最佳极化方法的有效性和可行性.%Optimal polarization is a valid approach to increase stealth target radar cross section (RCS) and improve the detection probability of stealth target.The inherent law of the target RCS and the polarization mode of the radar emitter are studied,which shows that the RCS change track is a cosine curve.A new method for extracting the optimal emission polarization is proposed.The target dynamic RCS under different polarization is simulated and compared,and the polarization gain for radar target de tection is studied by using the Swerling I detection model.The simulation results show that using optimal polarization brings 30 dB gain of RCS and 0.5 gain of detection probability.The simulation results also demonstrated the effectiveness and feasibility of the method to extract optimal polarization.