NDLI: Analysis of Two Alternative ADI-FDTD Formulations for Transverse-Electric Waves in Lossy Materials

Content Provider	IEEE Xplore Digital Library
Author	Pereda, J.A. Grande, A. Gonzalez, O. Vegas, A.
Copyright Year	1963
Abstract	A numerical dispersion analysis of the alternating-direction implicit finite-difference time-domain method for transverse-electric waves in lossy materials is presented. Two different finite-difference approximations for the conduction terms are considered: the double-average and the synchronized schemes. The numerical dispersion relation is derived in a closed form and validated through numerical simulations. This study shows that, despite its popularity, the accuracy of the double-average scheme is sensitive to how well the relaxation-time constant of the material is resolved by the time step. Poor resolutions lead to unacceptably large numerical errors. On the other hand, for good conductors, the synchronized scheme allows stability factors as large as 100 to be used without deteriorating the accuracy significantly.
Sponsorship	IEEE Antennas and Propagation Society
Starting Page	2047
Ending Page	2054
Page Count	8
File Size	972793
File Format	PDF
ISSN	0018926X
Volume Number	57
Issue Number	7
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-07-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Finite difference methods Time domain analysis Conducting materials Dispersion Frequency synchronization Numerical simulation Conductors Stability analysis Numerical stability stability Alternating-direction implicit finite-difference time-domain (FDTD) method lossy media numerical dispersion
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering

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Stability and dispersion analysis for higher order 3-D ADI-FDTD method

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