A comprehensive study of numerical anisotropy and dispersion in 3-D TLM meshes

Author

Berini, Pierre ; Wu, Ke

Author_Institution

Dept. de Genie Electr. et Inf., Ecole Polytech., Montreal, Que., Canada

Volume

43

Issue

5

fYear

1995

fDate

5/1/1995 12:00:00 AM

Firstpage

1173

Lastpage

1181

Abstract

This paper presents a comprehensive analysis of the numerical anisotropy and dispersion of 3-D TLM meshes constructed using several generalized symmetrical condensed TLM nodes. The dispersion analysis is performed in isotropic lossless, isotropic lossy and anisotropic lossless media and yields a comparison of the simulation accuracy for the different TLM nodes. The effect of mesh grading on the numerical dispersion is also determined. The results compare meshes constructed with Johns´ symmetrical condensed node (SCN), two hybrid symmetrical condensed nodes (HSCN) and two frequency domain symmetrical condensed nodes (FDSCN). It has been found that under certain circumstances, the time domain nodes may introduce numerical anisotropy when modelling isotropic media

Keywords

frequency-domain analysis; numerical analysis; time-domain analysis; transmission line matrix methods; 3-D TLM meshes; anisotropic lossless media; frequency domain symmetrical condensed nodes; hybrid symmetrical condensed nodes; isotropic lossless media; isotropic lossy media; mesh grading; numerical anisotropy; numerical dispersion; simulation; symmetrical condensed node; time domain nodes; Analytical models; Anisotropic magnetoresistance; Computational modeling; Dispersion; Equations; Frequency domain analysis; Numerical models; Performance analysis; Propagation constant; Time domain analysis;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.382081

Filename

382081