雷达探测低空目标时, 镜像“目标”严重影响雷达检测与仰角测量性能。镜像“目标”对雷达仰角测量的影响一般用两点源角闪烁模型来描述, 国内外已有很多文献对低空镜像角闪烁问题展开了研究, 但未对雷达极化的重要影响给予足够关注。本文着重围绕雷达天线极化和目标极化散射矩阵对低空镜像角闪烁的影响效应, 开展了理论推导与仿真分析, 相关模型可为雷达低空镜像角闪烁抑制技术提供参考和依据。

Specular multipath causes erratic elevation tracking at low target detection, which can be described as two-point glint model. The multipath errors encountered in radar tracking of low-elevation targets have attracted increasing interest in recent years. Many techniques for reducing radar multipath angle-tracking errors are proposed, but the important influence of radar polarization is not paid enough attention to. The theoretical derivation and simulation analysis are carried out about the effect of radar antenna polarization and polarization scattering matrix of target and image target. This proposed model can provide a reference for low angle target tracking.