Modal analysis of arbitrarily shaped irises in waveguides by a hybrid contour-integral mode-matching method

Author

Giese, F. ; Reiter, J.M. ; Arndt, F.

Author_Institution

Microwave Dept., Bremen Univ., Germany

fYear

1995

fDate

16-20 May 1995

Firstpage

1359

Abstract

A hybrid contour-integral mode-matching (CIMM) technique is presented for the rigorous calculation of the modal scattering parameters of arbitrarily shaped irises in waveguides which combines the advantages of flexibility and high numerical efficiency. The fast contour-integral matching yields the eigenmodes in the iris cross-sections for calculating the generalized scattering matrix of the complete iris discontinuity by the efficient mode-matching technique. This combined method takes arbitrary iris geometries, arbitrary rotation of the iris, and the effects of finite thickness or different waveguide ports rigorously into account. The method is verified by comparison with results calculated by the finite element method.<>

Keywords

S-parameters; circular waveguides; eigenvalues and eigenfunctions; finite element analysis; mode matching; rectangular waveguides; waveguide couplers; waveguide theory; arbitrarily shaped irises; circular waveguides; eigenmodes; finite element method; finite thickness; hybrid contour-integral mode-matching method; iris discontinuity; modal scattering parameters; rectangular waveguides; waveguide ports; Design automation; Filters; Finite element methods; Iris; Modal analysis; Mode matching methods; Rectangular waveguides; Scattering; Transmission line matrix methods; Waveguide discontinuities;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 1995., IEEE MTT-S International

Conference_Location

Orlando, FL, USA

ISSN

0149-645X

Print_ISBN

0-7803-2581-8

Type

conf

DOI

10.1109/MWSYM.1995.406223

Filename

406223