Theory of the symmetrical super-condensed node for the TLM method

Author

Trenkic, Vladica ; Christopoulos, Christos ; Benson, Trevor M.

Author_Institution

Dept. of Electr. & Electron. Eng., Nottingham Univ., UK

Volume

43

Issue

6

fYear

1995

fDate

6/1/1995 12:00:00 AM

Firstpage

1342

Lastpage

1348

Abstract

This paper describes a novel time-domain node for the TLM method. It has the unique feature of modeling arbitrary inhomogeneous media on a generally graded rectangular TLM mesh without using stubs. Variations in material properties and arbitrary aspect ratios of mesh cells are modeled by allowing different characteristic impedances in a cell, maintaining impulse synchronism throughout the mesh. The complete theory of the new node is given and its implementation on a general TLM mesh is discussed. Numerical results for a canonical resonator loaded with dielectric layers are presented for different grading cases. Substantial savings in computer storage and run-time as well as improved accuracy compared to the uniform mesh are achieved when an appropriate nonuniform grading of the TLM mesh is used

Keywords

S-matrix theory; dielectric resonators; mesh generation; transmission line matrix methods; TLM method; arbitrary aspect ratios; arbitrary inhomogeneous media; canonical resonator; characteristic impedances; dielectric layers; graded rectangular TLM mesh; impulse synchronism; nonuniform grading; symmetrical super-condensed node; time-domain node; Dielectrics; Impedance; Material properties; Nonhomogeneous media; Runtime; Scattering parameters; Symmetric matrices; Time domain analysis; Transmission line matrix methods; Transmission line theory;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.390192

Filename

390192