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Higher-order absorbing boundary conditions are introduced and implemented in 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
Published in:
Antennas and Propagation, IEEE Transactions on
(Volume:40
,
Issue:
10
)
Date of Publication: Oct 1992
- Page(s):
- 1215 - 1222
- ISSN :
- 0018-926X
- INSPEC Accession Number:
- 4379291
- Digital Object Identifier :
- 10.1109/8.182454
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 06 August 2002
- Issue Date :
- Oct 1992
- Sponsored by :
- IEEE Antennas and Propagation Society
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