Investigation of mode coupling due to ohmic wall losses in overmoded uniform and varying-radius circular waveguides by the method of cross sections

Author

Shafii, Jamal ; Vernon, Ronald J.

Author_Institution

Dept. of Electr. & Comput. Eng., Wisconsin Univ., Madison, WI, USA

Volume

50

Issue

5

fYear

2002

fDate

5/1/2002 12:00:00 AM

Firstpage

1361

Lastpage

1369

Abstract

The effect of ohmic wall losses on mode coupling in overmoded varying-radius circular waveguides is investigated. Mode coupling and multimode propagation in uniform lossy-wall circular waveguides is also discussed. The expressions for the coupling coefficients are given by line integrals of the power-normalized fields of the normal modes along the boundary of the waveguide cross section. Numerical results are presented for the case of propagation of an HE₁₁-like mode excitation in a uniform smooth lossy-wall circular waveguide

Keywords

boundary-value problems; circular waveguides; coupled mode analysis; differential equations; waveguide theory; coupled differential equations; coupled-mode formalism; coupling coefficients; eigenmodes; hybrid mode excitation; line integrals; method of cross sections; mode coupling; multimode propagation; ohmic wall losses; overmoded circular waveguides; power-normalized fields; uniform lossy-wall circular waveguides; varying-radius circular waveguides; Attenuation; Conductors; Couplings; Electric breakdown; Gyrotrons; Integral equations; Millimeter wave propagation; Millimeter wave technology; Planar waveguides; Propagation losses;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.999151

Filename

999151