分析电磁散射问题的MGFFT方法

A Multigrid-FFT Algorithm for Analyzing Scattering from Electrically Large Structures

采用多重网格法（ＭＧ）分析电大尺寸物体的电磁散射，这种ＭＧ方法与已有的几种多重矩量法有本质的不同，与其他多层方法相比，它是一种高效率的迭代方法。再利用积分方程的卷积特性引入ＦＦＴ方法快速计算迭代过程中矩阵与矢量的乘积，从而构成ＭＧＦＦＴ新算法，数值结果表明ＭＧＦＦＴ方法具有很高的计算效率，适用于电大尺寸问题的分析。

A new Multigrid-FFT (MGFFT) algorithm, combined multigrid method with FFT, ispresented in this paper for analyzing scattering from electrically large structures. Used as an efficientiterative algorithm, multigrid method (MG ) is different from other multilevel MoM in nature. In the MGprocedure, the FFT is applied for the calculation of the convolutional integrals involved. The numericalresults shown that the MGFFT method is an efficient approach for the analysis of electrically ladle sizeproblems.