Improved Version of the Second-Order Mur Absorbing Boundary Condition Based on a Nonstandard Finite Difference Model

被引:0
作者
Cole, J. B. [1 ]
Zhu, D. [1 ]
机构
[1] Univ Tsukuba, Tsukuba, Ibaraki 305, Japan
来源
APPLIED COMPUTATIONAL ELECTROMAGNETICS SOCIETY JOURNAL | 2009年 / 24卷 / 04期
关键词
Absorbing Boundary Condition; ABC; Mur ABC; Nonstandard Finite Difference; FDTD;
D O I
暂无
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
It is often necessary to terminate the computational domain of an FDTD calculation with an absorbing boundary condition (ABC). The Perfectly Matched Layer (PML) is an excellent ABC, but it is complicated and costly. Typically at least 8 layers are needed to give satisfactory absorption. Thus in a 100(3) domain less than 84(3) or 59% of the grid points are usable. The second-order Mur ABC requires just 2 layers, but its absorption is inadequate for many problems. In this paper we introduce an improved version of the second-order Mur ABC based on a nonstandard finite difference (NSFD) model which has the same low computational cost but with much better absorption on a coarse grid.
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页码:375 / 381
页数:7
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