A hybrid method for the solution of the electromagnetic scattering by an inhomogeneously filled trough or slit in a thick conducting screen

Author

Gedney, S.D. ; Mittra, R.

Author_Institution

Electromagn. Commun. Lab., Illinois Univ., Urbana, IL, USA

fYear

1990

fDate

7-11 May 1990

Firstpage

1730

Abstract

A hybrid method that combines the method of moments (MOM) and the finite element method (FEM) is presented. The technique´s power consists in the fact that the FEM matrix need only be filled and factored once. Subsequently, the aperture fields are then solved for when the cavity is perturbed by the equivalent aperture currents, and are matched to the exterior region. The exterior problem is then solved using the MOM. The MOM solution requires only the filling and factoring of a small dense matrix, providing a means to solve for the aperture currents for any number of incident fields. Numerical results for various problems are presented.<>

Keywords

conductors (electric); electromagnetic wave scattering; finite element analysis; FEM; MOM; aperture fields; dense matrix; electromagnetic scattering; equivalent aperture currents; exterior problem; exterior region; finite element method; hybrid method; incident fields; inhomogeneously filled slit; inhomogeneously filled trough; method of moments; thick conducting screen; Apertures; Electromagnetic fields; Electromagnetic modeling; Electromagnetic scattering; Finite element methods; Integral equations; Magnetosphere; Moment methods; Nonuniform electric fields; Surface treatment;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 1990. AP-S. Merging Technologies for the 90's. Digest.

Conference_Location

Dallas, TX, USA

Type

conf

DOI

10.1109/APS.1990.115463

Filename

115463