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针对掠海目标的低探测性问题,以蒙特卡洛法生成的PM(Pierson-Moskowitz)海洋谱粗糙面模拟真实海面,为消除人为截断粗糙面引起的边缘衍射,引入三维锥形波,结合稀疏矩阵平面迭代及规范网格法(SMFIA/CAG)与矩量法(MOM)求解目标与粗糙面的迭代积分方程。计算分析了掠海巡航导弹在高频段(HF)下的电磁散射特性,结果表明根据不同入射方向,采用相应的极化方式才能获得最佳探测效果。这对利用天波超视距雷达对抗超低空目标具有一定的参考价值。
In order to solve the problem of low detection of sea-swept targets, the real sea surface is simulated by Pierson-Moskowitz (PM) rough sea surface generated by Monte-Carlo method. In order to eliminate the edge diffraction caused by artificial truncated rough surface, a three- Iterative Integral Equations for Solving Target and Rough Surfaces by Matrix Iterative and Normal Mesh Method (MFA) and SMFIA / CAG. The electromagnetic scattering characteristics of the swept-ocean cruise missile at high frequency (HF) are calculated and analyzed. The results show that the best detection effect can be obtained by adopting the corresponding polarization method according to different incident directions. This is of certain reference value for utilizing the sky wave over-the-horizon radar to fight ultra-low altitude targets.