Title :
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
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;
Conference_Titel :
Microwave Symposium Digest, 1997., IEEE MTT-S International
Conference_Location :
Denver, CO, USA
Print_ISBN :
0-7803-3814-6
DOI :
10.1109/MWSYM.1997.596553
