Numerically derived absorbing boundary condition for the solution of open region scattering problems

Author

Ramahi, Omar M. ; Khebir, Ahmed ; Mittra, Raj

Author_Institution

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

Volume

39

Issue

3

fYear

1991

fDate

3/1/1991 12:00:00 AM

Firstpage

350

Lastpage

353

Abstract

An absorbing boundary condition is developed by means of a numerical approximation of the analytical behavior of the exact boundary condition. The boundary operator is more accurate than other analytically derived differential operators having the same order, and it can be applied to arbitrarily shaped scatterer geometries that can be handled most efficiently through the use of outer boundaries that conform to the body of the scatterer. Examples demonstrate the improvement in accuracy and efficiency achieved by the numerical boundary condition. The enhancement in accuracy is attributable to the inclusion of the evanescent harmonics behavior in the model

Keywords

boundary-value problems; electromagnetic wave scattering; numerical methods; absorbing boundary condition; arbitrarily shaped scatterer geometries; electromagnetic scattering; evanescent harmonics behavior; numerical approximation; open region scattering problems; Boundary conditions; Electromagnetic scattering; Error analysis; Geometry; Harmonic analysis; Integral equations; Laboratories; Magnetic analysis; Reflection; Research and development;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.76333

Filename

76333