TE characterization of resistive strip gratings on a dielectric slab using a single edge-mode expansion

Author

Volakis, J.L. ; Lin, Y.C. ; Anastassiu, H.

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA

Volume

42

Issue

2

fYear

1994

fDate

2/1/1994 12:00:00 AM

Firstpage

205

Lastpage

212

Abstract

Closed-form expressions are derived for the TE scattering by a narrow resistive strip array in the presence of a dielectric slab. This is accomplished by introducing a single edge-mode expansion to represent the strip current density followed by a Galerkin´s solution of the pertinent integral equation. The accuracy of the derived approximate expressions are examined by comparison with a moment method solution and several curves are shown, illustrating how the different array parameters affect the reflectivity and transmissivity of the array. Particular attention is given to the free-standing resistive strip array where an equivalent uniform resistive sheet is constructed for simulating the original periodic structure. The reactance of this equivalent sheet is compared with published expressions pertinent to the metallic strip array

Keywords

current density; dielectric materials; electromagnetic wave scattering; integral equations; reflectivity; Galerkin´s solution; TE characterization; TE scattering; approximate expressions; array parameters; closed-form expressions; dielectric slab; equivalent uniform resistive sheet; free-standing resistive strip array; integral equation; metallic strip array; moment method solution; reflectivity; resistive strip gratings; single edge-mode expansion; strip current density; transmissivity; Closed-form solution; Current density; Dielectrics; Gratings; Integral equations; Moment methods; Scattering; Slabs; Strips; Tellurium;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.277214

Filename

277214