Analysis of the electromagnetic scattering by thick gratings using a combined FEM/MM solution

Author

Gedney, Stephen D. ; Mittra, Raj

Author_Institution

Dept. of Electr. Eng., Kentucky Univ., Lexington, KY, USA

Volume

39

Issue

11

fYear

1991

fDate

11/1/1991 12:00:00 AM

Firstpage

1605

Lastpage

1614

Abstract

The problem of diffraction by a thick, conducting grating situated in an inhomogeneous dielectric slab is investigated using the generalized network formulation. This formulation combines the method of moments and the finite-element method, permitting the treatment of periodic elements of arbitrary cross section and inhomogeneous profiles. Solutions are presented for both transverse electric (TE) and transverse magnetic (TM) polarizations. Transmission gratings composed of rectangular conductors filled with dielectric materials of arbitrary profiles are studied

Keywords

diffraction gratings; electromagnetic wave diffraction; electromagnetic wave scattering; finite element analysis; arbitrary cross section; combined FEM/MM solution; conducting grating; electromagnetic diffraction; electromagnetic scattering; finite-element method; generalized network formulation; inhomogeneous dielectric slab; method of moments; periodic elements; rectangular conductors; thick gratings; transmission gratings; transverse electric polarisation; transverse magnetic polarisation; Dielectrics; Diffraction gratings; Electromagnetic analysis; Electromagnetic diffraction; Electromagnetic scattering; Finite element methods; Moment methods; Polarization; Slabs; Tellurium;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.102776

Filename

102776