Electromagnetic scattering by indented screens

Author

Asvestas, John S. ; Kleinman, Ralph E.

Author_Institution

Corp. Res. Center, Grumman Corp., Bethpage, NY, USA

Volume

42

Issue

1

fYear

1994

fDate

1/1/1994 12:00:00 AM

Firstpage

22

Lastpage

30

Abstract

The problem of three dimensional electromagnetic scattering from a perfectly conducting screen with a bounded indentation is formulated as a system of boundary integral equations for the electric current density on the cavity wall and the interface between the cavity and free space. It is shown how the fictitious current density on the interface may be eliminated resulting in an integral equation of the second kind for the current density on the cavity wall only, with no integration over the infinite screen. In addition, integral representations are derived that represent the field everywhere in space in terms of the current density on the cavity wall only. Furthermore, asymptotic expressions for the far field are also presented. The equations and representations simplify considerably in the two-dimensional scalar case and results are presented for both TE and TM polarization

Keywords

conductors (electric); current density; electromagnetic field theory; electromagnetic wave polarisation; electromagnetic wave scattering; integral equations; 3D electromagnetic scattering; TE polarization; TM polarization; asymptotic expressions; boundary integral equations; bounded indentation; cavity wall; electric current density; far field; free space; indented screens; interface; perfectly conducting screen; Current density; Eigenvalues and eigenfunctions; Electromagnetic scattering; Integral equations; Magnetic fields; Mathematics; Polarization; Resonance; Senior members; Tellurium;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.272297

Filename

272297