考虑曲率修正效应时粗糙面电磁散射的微扰法

Small Perturbation Method of Electromagnetic Scattering from Rough Surface with Considering the Effect of the Curvature of the Surface

本文在分析传统粗糙面电磁散射微扰法的基础上 ,给出了一种新的考虑曲率修正效应的微扰法 ,解决了传统微扰法计算掠入射散射时的误差问题 .文中同时采用传统微扰法和考虑曲率修正效应的微扰法对实际粗糙面的后向散射截面做了计算 ,并与有关实验测量结果做了比较 ,结果表明无论是中、小角度入射 ,还是掠入射 。

A new classical small perturbation method of electromagnetic scattering from rough surface with consideration of the effect of the curvature of the surface is presented.The problem of scattering error due to this method at a grazing angle is solved.Comparing with a set of measured data,numerical computations of the backscattering radar cross section for actual natural rough surface by the classical and new small perturbation methods are given.The results show that the new small perturbation method is validity for the small,moderate and grazing angle incidence.