The unimoment method applied to elliptical boundaries

Author

Jin, Jian-Ming ; Lu, Ninglong

Author_Institution

Dept. of Electr. & Comput. Eng., Illinois Univ., Urbana, IL, USA

Volume

45

Issue

3

fYear

1997

fDate

3/1/1997 12:00:00 AM

Firstpage

564

Lastpage

566

Abstract

A hybrid finite-element method (FEM) is presented for electromagnetic scattering by inhomogeneous dielectric cylinders of arbitrary cross section. The method employs an artificial elliptical boundary to enclose the scatterer and divide the solution region into interior and exterior regions. The field in the interior region is formulated using the FEM, and the field in the exterior region is represented by an eigenfunction expansion involving Mathieu functions. These fields are coupled at the elliptical boundary by enforcing field continuity conditions. A numerical example is given to demonstrate the advantages of the method

Keywords

dielectric materials; eigenvalues and eigenfunctions; electromagnetic wave scattering; finite element analysis; FEM; Mathieu functions; eigenfunction expansion; electromagnetic scattering; elliptical boundaries; exterior region; field continuity conditions; hybrid finite-element method; inhomogeneous dielectric cylinders; interior region; unimoment method; Boundary conditions; Conducting materials; Constitution; Diffraction; Eigenvalues and eigenfunctions; Electromagnetic scattering; Error correction; Finite element methods; Geometry; Transmission line matrix methods;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.558674

Filename

558674