An Efficient Unconditionally Stable Three-Dimensional LOD-FDTD Method

被引：7
|
作者：
Liu, Qi-Feng [1 ]
Chen, Zhizhang [2 ]
Yin, Wen-Yan [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Ctr Microwave & RF Technol, Sch Elect Informat & Elect Engn, Shanghai 200240, Peoples R China
[2] Dalhousie Univ, Dept Elect & Comp Engn, Microwave & Wireless Res Lab, Halifax, NS B3J 2X4, Canada
来源：
2008 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST, VOLS 1-4 | 2008年
基金：
加拿大自然科学与工程研究理事会;
关键词：
finite-different time-domain method; Courant-Friedrich-Levy (CFL) limit; locally one-dimensional scheme; alternating direction implicit method; unconditional stability and numerical dispersion;
D O I：
10.1109/MWSYM.2008.4633099
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：
This paper presents an unconditionally stable three-dimensional (3-D) finite-difference time-method (FDTD) based on the locally one-dimension (LOD-FDTD) scheme. The unconditional stability is proven theoretically and validated numerically. Numerical dispersion of the method is also derived analytically. Through the dispersion analysis and a numerical example, the proposed LOD-FDTD method is found to use less memory and CPU time than the conventional unconditionally stable alternating-direction-implicit (ADI) FDTD and other LOD-FDTD methods but with the same level of numerical accuracy. The saving in CPU time can be more than 55% in comparisons with the ADI-FDTD method and more than 29% in comparisons with a previously reported LOD-FDTD method.
引用
收藏
页码：45 / +
页数：2
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