三维电磁波体积分方程的快速多极子算法

被引：3

作者：

陈晓光

金亚秋

机构：

[1] 复旦大学波散射和遥感中心电子工程系

[2] 复旦大学波散射和遥感中心电子工程系上海

[3] 上海

来源：

电子科学学刊 | 2000年 / 06期

关键词：

三维积分方程; 快速多极子算法; 数值结果;

D O I：

暂无

中图分类号：

TN011 [电波传播、传播机理];

学科分类号：

080904 ;

摘要：

该文提出用快速多极子方法(FMM)求解三维非均匀介质散射体的电磁散射,将以往边界方程的FMM推广到三维矢量电磁波体积分方程(3DV-FMM),推导了一级和多级快速多极子的三维体积分离散公式。这一方法减少了计算机存储要求,并从量级上降低了共轭梯度迭代求解的矩量法的计算量。在计算中,选用δ函数作基函数,达到相当好的收敛性。本文用3DV-FMM数值计算了三维均匀和非均匀介质立方体,多个介质体的双站散射截面(RCS),以及任一剖面上的等效电流体密度分布。计算结果与矩量法相吻台,但在计算内存和CPU时间上要节省得多,本文的方法也可为三维电磁波逆散射的反演算法研究给出正向模拟的快速计算。

引用

页码：1007 / 1015

页数：9

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