Boundary conditions for finite element analysis combined with geometrical theory of diffraction

Author

Roturier, Benoit ; Souny, Bernard ; Baudrand, Henri

Author_Institution

Dept. Electron., Ecole Nat. de l´´Aviation Civile, Toulouse, France

Volume

31

Issue

3

fYear

1995

fDate

5/1/1995 12:00:00 AM

Firstpage

1542

Lastpage

1545

Abstract

In this paper a method is presented to enforce boundary conditions for a Finite Element (FE) analysis when free space or large external scatterers are present. The equivalence theorem is used to divide the original problem into an internal and an external part via introduction of equivalent sources. FE analysis solves the internal problem with standard metallic or magnetic boundary conditions while an asymptotic method, here the uniform version of the Geometrical Theory of Diffraction (GTD), deals with the external scatterers. A time harmonic variation of the fields is assumed

Keywords

boundary-value problems; electromagnetic wave scattering; finite element analysis; geometrical theory of diffraction; GTD; asymptotic method; boundary conditions; equivalence theorem; equivalent sources; finite element analysis; geometrical theory of diffraction; large external scatterers; Boundary conditions; Finite element methods; Integral equations; Iron; Magnetic analysis; Maxwell equations; Nonuniform electric fields; Physical theory of diffraction; Scattering; Sparse matrices;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.376324

Filename

376324