Relaxing CFL limit of FDTD by DWT | Zendy

Sun Zheng | Zendy; Shi LiHua | Zendy; Zhou YingHui | Zendy

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Relaxing CFL limit of FDTD by DWT

Author(s) -

Sun Zheng,

Shi LiHua,

Zhou YingHui

Publication year - 2014

Publication title -

electronics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.375

H-Index - 146

eISSN - 1350-911X

pISSN - 0013-5194

DOI - 10.1049/el.2013.4019

Subject(s) - finite difference time domain method , limit (mathematics) , mathematics , physics , computer science , electronic engineering , mathematical analysis , optics , engineering

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.

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