指数随机粗糙表面的电磁散射研究

EM Scattering from Exponent Rough Surface

本文利用数值方法研究指数随机粗糙表面的电磁散射问题。应用矩量法研究指数随机粗糙表面的电磁散射可以使我们获得较为精确的数值结果。但是 ,对于表面散射 ,应用矩量法时 ,表面未知变量的数目非常大 ,即使对于一维表面也需要几千个未知变量。当我们求解矩阵方程时 ,计算机对求解的问题有几个限制 ,一个是内存的限制 ,一个是速度的限制。为了克服内存的限制 ,发展了许多迭代数值算法。本文发展了一种新的数值迭代方法。利用这一方法 ,我们对指数随机粗糙表面的电磁散射问题进行了研究 ,并与矩阵反演方法进行了比较。所得结果表明 。

In this paper,the scattering from exponent rough surface is studied.By using moment method,a matrix equation is formed.Generally,the matrix equation is difficult to solve because the limitation of memory and speed of the computer.In order to overcome the problem,often an iterative mothod is used.The aim of this paper is to give an improvement on an iterative method that is presented by other authors.Using the improved methoed,the surface scattering field of exponent rough sruface is computed.The computed results are compared with that computed by matrix diect inverse method.The result shows that the agreement between two results is very good.So it prove that the new iterrative method is practical.