Numerical absorbing boundary condition for finite difference and finite element analysis of open periodic structures

Amir Boag, Raj Mittra, John R. Brauer

Research output: Contribution to journalConference articlepeer-review

Abstract

Presented in this paper is a new approach to deriving a numerical absorbing condition (NABC) for mesh truncation in the Finite Difference/Finite Element Methods (FD/FEM) analysis of scattering and radiation by periodic structures. Through imposing the absorption condition on a selected set of Floquet models at the truncation boundary, the NABC is obtained. The proposed approach preserves the sparsity of the FD/FEM matrices, unlike the boundary element method or matching to Floquet mode series. The accuracy of the method has been demonstrated for a number of 2D examples. Extension of the present formulation to the full 3D formulation is currently under investigation and the initial results look quite promising.

Original languageEnglish
Pages (from-to)2092-2095
Number of pages4
JournalIEEE Antennas and Propagation Society, AP-S International Symposium (Digest)
Volume3
StatePublished - 1994
Externally publishedYes
EventProceedings of the IEEE Antennas and Propagation International Symposium. Part 3 (of 3) - Seattle, WA, USA
Duration: 19 Jun 199424 Jun 1994

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