DocumentCode
54482
Title
Relaxing CFL limit of FDTD by DWT
Author
Zheng Sun ; Li-Hua Shi ; Ying-Hui Zhou
Author_Institution
Nat. Key Lab. on Electromagn. Environ. Effects & Electro-Opt. Eng., PLA Univ. of Sci. & Technol., Nanjing, China
Volume
50
Issue
7
fYear
2014
fDate
March 27 2014
Firstpage
486
Lastpage
488
Abstract
To extend the Courant-Friedrichs-Lewy (CFL) limit, a discrete wavelet transform (DWT) is incorporated into the finite difference time domain (FDTD) scheme. With the Mallat algorithm for the decomposition and reconstruction of the electromagnetic components, the unstable spatial modes can be efficiently filtered out. Consequently, the original strict CFL limit of the FDTD can be significantly relaxed, and much execution time can be saved. The performance and versatility of the proposed method is demonstrated by the numerical examples.
Keywords
discrete wavelet transforms; finite difference time-domain analysis; Courant-Friedrichs-Lewy; DWT; FDTD; Mallat algorithm; discrete wavelet transform; electromagnetic components; finite difference time domain; relaxing CFL limit;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el.2013.4019
Filename
6780215
Link To Document