Fast  MEI Algorithm and its Application on Electrically Large  Electromagnetic Scattering Problems

Zai Xinyu; Hong Wei

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Fast MEI Algorithm and its Application on Electrically Large Electromagnetic Scattering Problems

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- Fast MEI Algorithm and its Application on Electrically Large Electromagnetic Scattering Problems
- Acta Electronica Sinica Issue 9, Pages: 124-126(1999)
- 作者机构：
  
  东南大学毫米波国家重点实验室,南京,210096
- 作者简介：
- 基金信息：
- DOI：
  CLC： O441
- Published：1999
- 稿件说明：
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[1]宰昕宇,洪伟.快速MEI算法及其在电大尺寸电磁散射问题中的应用[J].电子学报,1999(09):124-126.

Zai Xinyu, Hong Wei. Fast MEI Algorithm and its Application on Electrically Large Electromagnetic Scattering Problems[J]. Acta Electronica Sinica, 1999, (9): 124-126.
[1]宰昕宇,洪伟.快速MEI算法及其在电大尺寸电磁散射问题中的应用[J].电子学报,1999(09):124-126. DOI：

Zai Xinyu, Hong Wei. Fast MEI Algorithm and its Application on Electrically Large Electromagnetic Scattering Problems[J]. Acta Electronica Sinica, 1999, (9): 124-126. DOI：

摘要

本文基于不变性测试方程法（ＭＥＩ）提出一种快速算法（Ｆａｓｔ ＭＥＩ），在二维散射体表面建立共形差分网格后，通过对节点的重新排序，将原问题中的稀疏矩阵变换为带状稀疏阵，从而使占用的计算机内存和计算时间均由Ｏ（Ｎ２）下降为Ｏ（Ｎ），可以解决原来无法计算的问题．文中成功地计算了最大周长为１００００个波长的几个电大尺寸二维柱体的电磁散射，并与矩量法、ＭＥＩ方法进行了比较．

Abstract

This paper presents a fast algorithm based on the measured equation of invariance （Fast MEI）.Conformal meshes are made along the surface of two dimensional scatterer.Renumbering of nodes changed the original sparse matrix into band one

and the consumption of computer memory and CPU time decrease from O（N 2） to O（N） .Via this new algorithm

electrically large problem can now be rapidly solved.The scattering fields are computed on several 2 D cylinders with the maximum perimeter of 10

000 wave length.The results are then compared with that got by MOM and MEI.

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