粗糙面与导弹目标复合电磁散射仿真计算

提出了一种求解粗糙面和三维目标复合电磁散射问题的通用仿真方法。将描述粗糙面上电磁波反射的基尔霍夫-赫姆霍兹方程与目标表面的电场积分方程相结合,得到新型的混合方程,进而采用矩量法求解,通过数值算例验证了该方法的精度和效率。采用此方法研究了两种典型导弹目标与粗糙面的复合散射特性,分析计算结果可得:粗糙面粗糙度参数对复合散射特性有着重要的影响作用。

Simulative Calculation on Composite EM Scattering from Rough Surface and Missile Target

A general simulation method for solving electromagnetic scattering (EM) from rough surface and three dimensional target is proposed. By combining Kirchhoff-Helmholtz (KH) equation describing EM wave reflection on rough surface with electric field integral equation (EFIE) build on target surface, a novel KH-EFIE hybrid equation is obtained, and then it can be solved by using method of moment (MoM). By adopting this simulation method, the composite EM scattering from two classic missile targets and rough surface is investigated respectively, and it can be seen that roughness of surface has great influence on the composite EM scattering characteristics.