A Spatially Filtered Finite-Difference Time-Domain Scheme With Controllable Stability Beyond the CFL Limit: Theory and Applications

被引：35
|
作者：
Chang, Chun [1 ]
Sarris, Costas D. [1 ]
机构：
[1] Univ Toronto, Dept Elect & Comp Engn, Toronto, ON M5S 3G4, Canada
来源：
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 2013年 / 61卷 / 01期
关键词：
Finite difference time domain (FDTD); numerical stability; SUBGRIDDING ALGORITHM; FDTD; EXPLICIT;
D O I：
10.1109/TMTT.2012.2224670
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：
A 3-D finite-difference time-domain (FDTD) scheme with controllable stability beyond the stability limit of FDTD is presented. The key to controlling the FDTD stability limit is a spatial filter applied to the electromagnetic field vectors in order to ensure that unstable spatial harmonics are eliminated. A significant advantage of this approach is the simplicity of its incorporation into existing FDTD codes. Moreover, this method is employed as a means to implement a late-time stable 3-D sub-gridding scheme. Applications include wave guide filters and the analysis of screens for near-field sub-wavelength focusing at microwave frequencies.
引用
收藏
页码：351 / 359
页数：9
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