Coaxial probe modeling in waveguides and cavities

Author

Liang, Ji-Fuh ; Chang, Hsin-Chin ; Zaki, Kawthar A.

Author_Institution

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

Volume

40

Issue

12

fYear

1992

fDate

12/1/1992 12:00:00 AM

Firstpage

2172

Lastpage

2180

Abstract

Modeling, design, and sensitivity analysis of probe-excited cavities are presented. The three-cavity-moment method is used to obtain the two-port scattering matrix of the probe-excited semi-infinite waveguide while a novel equivalent circuit is introduced and used as a circuit model for the scattering matrix. A design procedure for probe-excited input/output cavities in waveguide filters is proposed, and a sensitivity analysis is carried out to show the effect of the probe´s dimensions on the electrical characteristics of the circuit. Agreement with experimental data is excellent for loosely coupled probe-excited semi-infinite waveguide problems. An example for a 15-GHz-thick iris filter verifies the validity of the proposed design

Keywords

S-matrix theory; cavity resonators; equivalent circuits; microwave filters; modelling; passive filters; probes; sensitivity analysis; circuit model; coaxial probe modelling; design procedure; electrical characteristics; equivalent circuit; iris filter; probe-excited cavities; semi-infinite waveguide problems; sensitivity analysis; three-cavity-moment method; two-port scattering matrix; waveguide filters; Coaxial components; Coupling circuits; Electric variables; Equivalent circuits; Filters; Iris; Probes; Scattering; Sensitivity analysis; Transmission line matrix methods;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.179878

Filename

179878