A higher-order boundary condition for finite element mesh truncation in open region scattering problems

Author

Khebir, A. ; Kouki, A.B. ; Mittra, R.

Author_Institution

Electromagn. Commun. Lab., Illinois Univ., Urbana, IL, USA

fYear

1990

fDate

7-11 May 1990

Firstpage

1260

Abstract

A higher order absorbing condition (ABC) is derived for finite-element mesh truncation, which, unlike many of the available ABCs, incorporates both the lower and higher order harmonics in its derivation. It is demonstrated that the use of the higher order ABC results in a significant improvement over the Bayliss, Grunzburger, and Turkel (BGT) boundary conditions (1982), when used in conjunction with the finite-element approach to solving a variety of scattering problems. Numerical results are presented for a perfectly conducting circular cylinder and wedge.<>

Keywords

boundary-value problems; electromagnetic wave scattering; finite element analysis; partial differential equations; absorbing condition; electromagnetic scattering; finite element mesh truncation; higher order harmonics; higher-order boundary condition; lower order harmonics; open region scattering; perfectly conducting circular cylinder; perfectly conducting wedge; Boundary conditions; Conductors; Electromagnetic scattering; Equations; Finite element methods; Laboratories; Moment methods; Radar cross section; Radar scattering; Tellurium;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 1990. AP-S. Merging Technologies for the 90's. Digest.

Conference_Location

Dallas, TX, USA

Type

conf

DOI

10.1109/APS.1990.115341

Filename

115341