Efficient TLM diakoptics for separable structures

Author

Righi, Mario ; Hoefer, Wolfgang J R ; Mongiardo, Mauro ; Sorrentino, Roberto

Author_Institution

Dept. of Electr. & Comput. Eng., Victoria Univ., BC, Canada

Volume

43

Issue

4

fYear

1995

fDate

4/1/1995 12:00:00 AM

Firstpage

854

Lastpage

859

Abstract

An efficient yet rigorous application of diakoptics to TLM simulation of discontinuities in homogeneously filled waveguides is proposed. The method, based on the expansion of the time-domain Green´s function into frequency independent eigenfunctions, leads to a dramatic reduction of the numerical effort when compared to the standard Johns Matrix approach. Numerical results show that this new approach provides wide band absorbing boundaries for waveguide problems where several modes (whether propagating or evanescent) are present. In this way, the computational domain is also reduced to just a small region around the discontinuity, with the absorbing boundaries placed just a few cells away

Keywords

Green´s function methods; eigenvalues and eigenfunctions; transmission line matrix methods; waveguide discontinuities; waveguide theory; TLM diakoptics; absorbing boundaries; computational domain; evanescent modes; frequency independent eigenfunctions; homogeneously filled waveguides; propagating modes; separable structures; time-domain Green´s function; waveguide discontinuities; waveguide problems; wideband absorbing boundaries; Boundary conditions; Councils; Diakoptics; Electromagnetic waveguides; Frequency; Time domain analysis; Transmission line matrix methods; Waveguide components; Waveguide discontinuities; Wideband;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.375234

Filename

375234