DocumentCode :
944532
Title :
Analysis of the accuracy of the numerical reflection coefficient of the finite-difference time-domain method at planar material interfaces
Author :
Christ, Andreas ; Benkler, Stefan ; Fröhlich, Jürg ; Kuster, Niels
Author_Institution :
Found. for Res. on Inf. Technol. in Soc., Swiss Fed. Inst. of Technol., Zurich, Switzerland
Volume :
48
Issue :
2
fYear :
2006
fDate :
5/1/2006 12:00:00 AM
Firstpage :
264
Lastpage :
272
Abstract :
This paper presents a rigorous analysis of the numerical error of the reflection coefficient of the finite-difference time-domain (FDTD) algorithm at planar material boundaries. The derived expressions show that the numerical reflection depends on a large number of parameters, such as the grid resolution and the time step, the frequency, the angle, and the polarization of the incident wave. In conclusion, the FDTD algorithm does not accurately fulfil the boundary conditions for the continuity of the fields. The theoretical findings enable the detailed characterization of the field behavior in the grid at material interfaces. The numerical total reflection and the Brewster angle are studied as well as the discretization influences on the specific absorption rate (SAR).
Keywords :
computational electromagnetics; electromagnetic wave reflection; finite difference time-domain analysis; FDTD; field behavior; finite-difference time-domain method; numerical reflection coefficient; planar material interfaces; specific absorption rate; Arithmetic; Boundary conditions; Dielectric materials; Electromagnetic fields; Error correction; Finite difference methods; Material properties; Permittivity; Reflection; Time domain analysis; FDTD; SAR; numerical methods; reflection; refraction;
fLanguage :
English
Journal_Title :
Electromagnetic Compatibility, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9375
Type :
jour
DOI :
10.1109/TEMC.2006.873850
Filename :
1634739
Link To Document :
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