Field theory analysis of conically shaped coupling elements in dual mode filters and polarizers

Author

Balaji, U. ; Vahldieck, R.

Author_Institution

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

Volume

3

fYear

1997

fDate

8-13 June 1997

Firstpage

1247

Abstract

The S-parameters of conically shaped coupling elements in dual mode filters and polarizers in circular waveguides have been derived using the mode matching method. The coupling elements are single or double ridges of uniform angular thickness placed at any arbitrary angle to the excitation in order to couple the orthogonal polarizations. Using ridges of this shape enables the analysis entirely in cylindrical coordinates and the evaluation of some of the coupling integrals analytically. A 90/spl deg/ differential phase shift between the orthogonal modes for a polarizer application has also been realized using a double ridged circular waveguide.

Keywords

S-parameters; circular waveguides; electromagnetic wave polarisation; mode matching; ridge waveguides; waveguide couplers; waveguide filters; waveguide theory; S-parameters; circular waveguide; conically shaped coupling element; differential phase shift; double ridge; dual mode filter; dual mode polarizer; field theory; mode matching; orthogonal polarization; single ridge; Electromagnetic wave polarization; Electromagnetic waveguides; Fasteners; Filtering theory; Filters; Mode matching methods; Performance analysis; Scattering parameters; Transformers; Waveguide discontinuities;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 1997., IEEE MTT-S International

Conference_Location

Denver, CO, USA

ISSN

0149-645X

Print_ISBN

0-7803-3814-6

Type

conf

DOI

10.1109/MWSYM.1997.596553

Filename

596553