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雷达极化学揭示了电磁波与目标相互作用的变极化效应,充分挖掘和利用目标极化信息,对提高雷达探测性能具有重要意义。文中对在外辐射源雷达(PBR)探测中利用双极化特征提高探测性能进行了研究。首先,对目标和城区杂波的PBR双极化特性分别进行了仿真计算与实测分析,得到了其交叉极化分量与共极化分量之间的大小关系,为PBR中双极化技术应用提供了基础;然后,根据无源相干定位技术推导了PBR探测公式,揭示了其与目标双站距离、极化散射特性、多普勒频率之间的关系;最后,根据实验结果具体分析了双极化技术对PBR探测性能改善情况。研究表明,由于双极化探测更充分、有效地利用了目标自身极化散射特性,并用交叉极化方式有效抑制了杂波,所以采用双极化融合技术能有效提高PBR探测性能。
Radar Polarization reveals the variable polarization effect of the interaction between electromagnetic wave and the target. It is of great significance to improve the radar detection performance by fully exploiting and utilizing the target polarization information. In this paper, the research on improving the detection performance by using the dual polarization feature in the detection of external radiation source radar (PBR) is studied. First of all, the PBR dual polarization characteristics of the target and urban clutter are simulated and measured respectively, and the size relationship between the cross-polarization component and the co-polarization component is obtained, which provides the application of the dual polarization technology in PBR Based on the passive coherent positioning technology, the PBR detection formula is deduced to reveal the relationship between the target and the target double-station distance, polarization scattering characteristics and Doppler frequency. Finally, based on the experimental results, the dual polarization Technology to improve PBR detection performance. The research shows that dual polarization technique can effectively improve PBR detection performance because dual polarization detection more fully and effectively utilizes the target’s own polarization scattering characteristics and effectively suppresses clutter by using cross-polarization method.