Modeling dispersive dielectrics for the 2-D TLM method

Author

Barba, I. ; Cabeceira, A.C.L. ; Represa, J. ; Panizo, M. ; Pereira, C.

Author_Institution

Dept. de Electr. y Electron., Valladolid Univ., Spain

Volume

6

Issue

4

fYear

1996

fDate

4/1/1996 12:00:00 AM

Firstpage

174

Lastpage

176

Abstract

The transition line matrix (TLM) method, since it is a time-domain method, cannot deal directly with dispersive media. We propose a way for modeling such media, starting from the causality relationship between field vectors D and E, which is discretized over the same space-time mesh as the two-dimensional TLM mesh. This leads to adding a voltage source at each node, its value depending on the previous instants. The method is validated by computing the reflection coefficient at an air-water interface and the cutoff frequencies of a rectangular waveguide containing a Debye dielectric

Keywords

dielectric-loaded waveguides; dispersion (wave); electromagnetic wave propagation; mesh generation; rectangular waveguides; time-domain analysis; transmission line matrix methods; waveguide theory; 2D TLM method; Debye dielectric; air-water interface; causality relationship; cutoff frequencies; dispersive dielectrics; field vectors; rectangular waveguide; reflection coefficient; space-time mesh; time-domain method; transition line matrix method; voltage source; Cutoff frequency; Dielectrics; Dispersion; Equations; Finite difference methods; Hafnium; Permittivity; Time domain analysis; Transmission line matrix methods; Voltage;

fLanguage

English

Journal_Title

Microwave and Guided Wave Letters, IEEE

Publisher

ieee

ISSN

1051-8207

Type

jour

DOI

10.1109/75.481079

Filename

481079