Reduction of numerical dispersion in FDTD method through artificial anisotropy

Author

Juntunen, Jaakko S. ; Tsiboukis, Theodoros D.

Author_Institution

Radio Lab., Helsinki Univ. of Technol., Espoo, Finland

Volume

48

Issue

4

fYear

2000

fDate

4/1/2000 12:00:00 AM

Firstpage

582

Lastpage

588

Abstract

In this paper, a simple and computationally low-cost modification of the standard finite-difference time-domain (FDTD) algorithm is presented to reduce numerical dispersion in the algorithm. Both two- and three-dimensional cases are considered. It is shown that the maximum error in phase velocity can be reduced by a factor of 2-7, depending on the shape of the FDTD cell. Although the reduction procedure is optimal for only single frequency, numerical examples show that the proposed method can also improve the accuracy significantly in wide-band inhomogeneous problems

Keywords

anisotropic media; electromagnetic wave propagation; finite difference time-domain analysis; inhomogeneous media; FDTD method; artificial anisotropy; electromagnetic wave propagation; finite-difference time-domain algorithm; numerical dispersion; phase velocity; three-dimensional algorithm; two-dimensional algorithm; wideband inhomogeneous system; Anisotropic magnetoresistance; Dispersion; Finite difference methods; Frequency dependence; Permittivity; Resonance; Shape; Tellurium; Time domain analysis; Wideband;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.842030

Filename

842030