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A new class of analytical absorbing boundary conditions (ABCs) for the truncation of the finite-difference time-domain (FDTD) lattice is introduced. These ABC originate from the exact impedance boundary operator and contain both electric and magnetic fields. The performance of the proposed second-order ABCs is studied with a two-dimensional FDTD program. The results indicate that the proposed ABCs work approximately as well as the third-order analytical ABCs, even if they are essentially as easy to implement as the second-order Mur ABC. Also, in this paper, the relation between the so-called Engquist-Majda operator for the absorption of plane waves and the exact surface impedance boundary condition is discussed.
Published in:
Microwave Theory and Techniques, IEEE Transactions on
(Volume:51
,
Issue:
2
)
Date of Publication: Feb. 2003
- Page(s):
- 560 - 563
- ISSN :
- 0018-9480
- INSPEC Accession Number:
- 7966415
- Digital Object Identifier :
- 10.1109/TMTT.2002.807816
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 19 February 2003
- Issue Date :
- Feb. 2003
- Sponsored by :
- IEEE Microwave Theory and Techniques Society
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