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Surface impedance concepts are introduced into the finite-difference time-domain (FDTD) method. Lossy conductors are replaced by surface impedance boundary conditions (SIBC), reducing the solution space and producing significant computational savings. Specifically, a SIBC is developed to replace a lossy dielectric half-space. An efficient implementation of this FDTD-SIBC based on the recursive properties of convolution with exponentials is presented. Finally, three problems are studied to illustrate the accuracy of the FDTD-SIBC formulation: a plane wave incident on a lossy dielectric half-space, a line current over a lossy dielectric half-space, and wave propagation in a parallel-plate waveguide with lossy walls
Published in:
Antennas and Propagation, IEEE Transactions on
(Volume:40
,
Issue:
1
)
Date of Publication: Jan 1992
- Page(s):
- 38 - 48
- ISSN :
- 0018-926X
- INSPEC Accession Number:
- 4133814
- Digital Object Identifier :
- 10.1109/8.123351
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 06 August 2002
- Issue Date :
- Jan 1992
- Sponsored by :
- IEEE Antennas and Propagation Society
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