Finite element analysis of electromagnetic scattering from a cavity

Author

Van, Tri ; Wood, Aihua W.

Author_Institution

AFIT/ENC, Air Force Inst. of Technol., Wright-Patterson AFB, OH, USA

Volume

51

Issue

1

fYear

2003

fDate

1/1/2003 12:00:00 AM

Firstpage

130

Lastpage

137

Abstract

A finite element method (FEM) is implemented to compute the radar cross section of a two-dimensional (2D) cavity embedded in an infinite ground plane. The method is based on the variational formulation which uses the Fourier transform to couple the fields outside the cavity and those inside the cavity; hence, the scattering problem can be reduced to a bounded domain. The convergence of the discrete finite element problem is analyzed. Numerical results are presented and compared with those obtained by the standard finite element-Green function method and by the 2D integral equation method.

Keywords

Fourier transforms; Green´s function methods; convergence of numerical methods; electromagnetic field theory; electromagnetic wave scattering; finite element analysis; integral equations; radar cross-sections; 2D cavity; 2D integral equation method; Fourier transform; Green function method; bounded domain; electromagnetic scattering; embedded cavity; finite element analysis; infinite ground plane; radar cross section; Apertures; Convergence; Electromagnetic analysis; Electromagnetic scattering; Finite element methods; Fourier transforms; Integral equations; Radar cross section; Radar scattering; Two dimensional displays;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2003.808517

Filename

1187426