Coaxial probe modeling in waveguides and cavities

Author

Liang, J.-F. ; Zaki, K.A.

Author_Institution

Dept. of Electr. Eng., Maryland Univ., College Park, MD, USA

fYear

1992

fDate

1-5 June 1992

Firstpage

115

Abstract

Extraction of the two-port scattering matrix of a probe-excited semiinfinite waveguide based on moment method solutions of three short-circuited guides is presented. Results show that this solution (1) provides an easy way to determine the two-port scattering matrix of probe-excited waveguide problems, and (2) enables the accurate determination of the loading effects of the probe on the resonant frequencies of unperturbed cavities. Both of these provide a key to the design of input/output cavities of waveguide filters. Agreement with experimental data is excellent for loose-coupled probe-excited semiinfinite waveguide problems.<>

Keywords

S-matrix theory; cavity resonators; probes; waveguide theory; coaxial probe modelling; input/output cavities; loading effects; moment method solutions; probe-excited semiinfinite waveguide; resonant frequencies; short-circuited guides; two-port scattering matrix; unperturbed cavities; waveguide filters; Apertures; Circuits; Coaxial components; Frequency; Impedance; Microwave filters; Moment methods; Probes; Scattering; Transmission line matrix methods;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 1992., IEEE MTT-S International

Conference_Location

Albuquerque, NM, USA

ISSN

0149-645X

Print_ISBN

0-7803-0611-2

Type

conf

DOI

10.1109/MWSYM.1992.187921

Filename

187921