Analysis of EM penetration into and scattering by electrically large open waveguide cavities using Gaussian beam shooting

Author

Burkholder, Robert J. ; Pathak, Prabhakar H.

Author_Institution

Dept. of Electr. Eng., Ohio State Univ., Columbus, OH, USA

Volume

79

Issue

10

fYear

1991

fDate

10/1/1991 12:00:00 AM

Firstpage

1401

Lastpage

1412

Abstract

Gaussian beam (GB) representation methods are used to analyze the electromagnetic coupling into and the scattering by a large nonuniform cavity. The aperture field in the cavity is decomposed into beams using the Gabor expansion, and shooting techniques are then employed. The method is illustrated only for the two-dimensional (2-D) case. The GBs are tracked axially using the rules of beam optics which ignore any beam distortion upon reflection at the walls. The effects of beam distortion are not significant for relatively slowly varying waveguide cavities. The field scattered into the exterior by the termination within the cavity is found using a reciprocity integral formulation which requires a knowledge of the beam fields near the termination. Numerical results based on this GB approach are presented and compared with results based on an independent reference solution

Keywords

cavity resonators; electromagnetic wave scattering; waveguide theory; 2D case; EM penetration; EM scattering; Gabor expansion; Gaussian beam shooting; aperture field; beam distortion; beam fields; beam optics; electrically large open waveguide cavities; electromagnetic coupling; large nonuniform cavity; numerical results; reciprocity integral formulation; termination; Apertures; Electromagnetic analysis; Electromagnetic coupling; Electromagnetic scattering; Optical beams; Optical distortion; Optical reflection; Optical scattering; Optical waveguides; Two dimensional displays;

fLanguage

English

Journal_Title

Proceedings of the IEEE

Publisher

ieee

ISSN

0018-9219

Type

jour

DOI

10.1109/5.104215

Filename

104215