NDLI: On the FDTD Formulations for Modeling Wideband Lorentzian Media

Content Provider	IEEE Xplore Digital Library
Author	Zhili Lin Yuntuan Fang Jiandong Hu Chunxi Zhang
Copyright Year	1963
Abstract	Several popular numerical approaches for modeling the dispersion characteristics of complex media are applied to simulate the wave propagation in the wideband Lorentzian (WBL) media under the second-order or fourth-order accurate finite-difference time-domain (FDTD) formulation. Their implementing algorithms and work performance for this type of dispersive materials are studied and compared to each other. The coefficients of a general second-order discrete numerical model pertaining to each of these approaches are derived respectively and a unified set of FDTD updating equations for implementing them is presented. In light of the analytical results calculated from the given numerical dispersion equations that determines the effective permittivity and permeability of a corresponding artificial WBL medium and the simulation results from the practical FDTD simulations for an exemplified WBL medium, the modeling accuracy and stability limits of these approaches are presented by evaluating the absolute errors of both the propagation and transmission functions of a plane electromagnetic pulse wave propagating in the WBL material and transmitting through an interface between the vacuum and the WBL medium under the second-order or fourth-order FDTD formulation combined with each of the discussed approaches.
Sponsorship	IEEE Antennas and Propagation Society
Starting Page	1338
Ending Page	1346
Page Count	9
File Size	818426
File Format	PDF
ISSN	0018926X
Volume Number	59
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-04-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Mathematical model Finite difference methods Time domain analysis Dispersion Numerical models Media Equations wideband Lorentzian media Finite-difference time-domain (FDTD) method numerical dispersion
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering

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