Improvement in calculation of some surface integrals: application to junction characterization in cavity filter design

Author

Guillot, Philippe ; Couffignal, Patrick ; Baudrand, Henri ; Theron, Bernard

Author_Institution

Lab. d´´Electron., ENSEEIHT, Toulouse, France

Volume

41

Issue

12

fYear

1993

fDate

12/1/1993 12:00:00 AM

Firstpage

2156

Lastpage

2160

Abstract

A rigorous method which makes it possible to reduce a surface integral to a contour integral is developed. The application of this formulation to the study of a circular-to-rectangular waveguide junction reduces the time of computation of the scattering parameters by more than 50%. The method is used to calculate the electromagnetic coupling of circular cavities by a rectangular iris. This approach, together with an optimization procedure, has allowed the direct design of a filter without any further mechanical adjustments. The results obtained are in good agreement with experimental data

Keywords

S-parameters; cavity resonators; integral equations; microwave filters; optimisation; passive filters; waveguide couplers; cavity filter design; circular cavities; circular-to-rectangular waveguide junction; contour integral; electromagnetic coupling; junction characterization; optimization procedure; rectangular iris; scattering parameters; surface integrals; Electromagnetic coupling; Electromagnetic fields; Electromagnetic waveguides; Filters; Iris; Rectangular waveguides; Surface waves; Transmission line matrix methods; Waveguide discontinuities; Waveguide junctions;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.260700

Filename

260700