Higher Order Absorbing Boundary Conditions for the Finite-Difference Time-Domain Method

Panayiotis A. Tirkas, Constantine Balanis, Rosemary Renaut

Research output: Contribution to journalArticle

53 Scopus citations

Abstract

Higher order absorbing boundary conditions are introduced and implemented into a finite-difference time-domain (FDTD) computer code. Reflections caused by the absorbing boundary conditions are examined. For the case of a point source radiating in a finite computational domain, it is shown that the error decreases as the order of approximation of the absorbing boundary condition increases. Fifth-order approximation reduces the normalized reflections to less than 0.2% whereas the widely used second-order approximation produces about 3% reflections. A method for easy implementation of any order approximation is also presented.

Original languageEnglish (US)
Pages (from-to)1215-1222
Number of pages8
JournalIEEE Transactions on Antennas and Propagation
Volume40
Issue number10
DOIs
StatePublished - Oct 1992

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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