Analysis of a solid variable-length cylindrical post in a rectangular waveguide

Author

Roelvink, J. ; Williamson, A.G.

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Auckland

Volume

1

Issue

2

fYear

2007

fDate

4/1/2007 12:00:00 AM

Firstpage

506

Lastpage

512

Abstract

The problem of a solid cylindrical post in a rectangular waveguide is analysed by an approach in which the electric field off the end of the post is represented as a Gegenbauer polynomial series whose coefficients are determined from the solution of an integral equation by a Chebyshev polynomial approximation process. Numerical results for the fields in the gap region, and the induced current distributions on the surfaces of the post are presented. A comparison between the current distributions of solid and hollow posts is made, and a length-adjustment factor, relating these two posts, is developed. Results for the reactance are shown to be in excellent agreement with experimental measurements

Keywords

Chebyshev approximation; current distribution; electric fields; electric reactance; integral equations; polynomial approximation; rectangular waveguides; waveguide discontinuities; Chebyshev polynomial approximation process; Gegenbauer polynomial series; electric field; electric reactance; induced current distribution; integral equation; length-adjustment factor; rectangular waveguide; solid variable-length cylindrical post;

fLanguage

English

Journal_Title

Microwaves, Antennas & Propagation, IET

Publisher

iet

ISSN

1751-8725

Type

jour

DOI

10.1049/iet-map:20060182

Filename

4167715