A waveguide polarization controller

Author

Sarabandi, Kamal

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI

Volume

42

Issue

11

fYear

1994

fDate

11/1/1994 12:00:00 AM

Firstpage

2171

Lastpage

2174

Abstract

In this paper a novel waveguide polarizer is introduced that does not require rotary joints and the frequency of operation can easily be adjusted by a few set screws. In this method the degenerate eigenvalues of a circular waveguide are separated by deforming the waveguide cross section slightly. In order to generate a desired polarization, the orientation angle of the deformation point with respect to the polarization of the incident wave can be adjusted using a rotary roller mechanism concentric with the circular waveguide. Analysis of the problem based on the finite element method and an approximate analytical method is given. A prototype model at 34.5 GHz is built and tested. Experimental results shows excellent agreement with the theoretical prediction

Keywords

circular waveguides; deformation; eigenvalues and eigenfunctions; electromagnetic wave polarisation; finite element analysis; millimetre wave devices; waveguide components; waveguide theory; 34.5 GHz; EHF; FEM; MM-wave device; approximate analytical method; circular waveguide; degenerate eigenvalues; finite element method; operation frequency adjustment; rotary roller mechanism; set screws; waveguide cross section; waveguide polarization controller; Degradation; Dielectrics; Frequency; Optical polarization; Optical retarders; Optical transmitters; Optical waveguides; Radar measurements; Radar remote sensing; Shafts;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.330135

Filename

330135