To-Average or Not-to-Average in FDTD Modeling of Dielectric Interfaces
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To-Average or Not-to-Average in FDTD Modeling of Dielectric Interfaces摘要
Accurate Finite Difference Time Domain (FDTD) modeling of localized electromagnetic sources such as cellular telephones near the human body requires very precise modeling of the location of these devices. This paper discusses the effective location of near field sources when dielectric interface cells are made up of either averaged or unaveraged dielectric properties. It is shown that either method can accurately define the proximity between source and dielectric, but that the effective location differs by half an FDTD cell in the two methods.
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参考
K.S. Yee, “Numerical solution of initial boundary
value problems involving Maxwell's equations in
isotropic media,” IEEE Transactions on Antennas
and Propagation, 14 (3), March 1966, pp. 302-
A. Taflove and S. Hagness, Computational
Electro-dynamics: The Finite-Difference TimeDomain Method, 3 ed., Boston, MA, Artech
House, 2005.
J.C. Lin, “Cellular telephones and children,”
IEEE Antennas and Propagation Magazine, 44
(5), October 2002, pp. 142-145.
F. Schonborn, M. Burkhardt, and N. Kuster, “Differences in energy absorption between heads of
adults and children in the near field of sources,”
Health Physics, 74, 1998, pp. 160-168.
O.P. Gandhi, G. Lazzi, and C.M. Furse, “Electromagnetic absorption in the human head and neck
for mobile telephones at 835 and 1900 MHz,”
IEEE Trans. Microwave Theory and Techniques,
MTT-48, 2000, pp. 1118-1126.
J.G. Maloney, and G.S. Smith, “A comparison of
methods for modeling electrically thin dielectric
and conducting sheets in the finite-difference
time-domain (FDTD) method,” IEEE Trans.
Antennas and Propagation, 41 (5), May 1993, pp.
-694.
G. Marrocco, M. Sabbadini, and F. Bardati,
“FDTD improvement by dielectric subgrid
resolution,” IEEE Trans. Microwave Theory and
Techniques, 46 (12), December 1998, pp. 2166-
M. Cheluch-Marcysiak, and W.K. Gwarek,
“Higher-order modeling of media interfaces for
enhanced FDTD analysis of microwave circuits,”
in Proc. European Microwave Conf., Cannes,
France, 1994.
T. Hirono, et al., “The second-order condition for
the dielectric interface orthogonal to the Yeelattice axis in the FDTD scheme,” IEEE
Microwave and Guided Wave Letters, 10 (9),
September 2000, pp. 359-361.
W.K. Gwarek, “Analysis of an arbitrarily-shaped
planar circuit – a time domain approach,” IEEE
FURSE, WATERMAN, GRIFFITHS: TO-AVERAGE OR NOT-TO-AVERAGE FDTD MODELING OF DIELECTRIC INTERFACES 175
Trans. Microwave Theory and Techniques, 33,
October 1985, pp. 1067-1072.
A. Taflove, Advances in Computational Electrodynamics: The Finite-Difference Time-Domain
Method. Norwood, MA: Artech House, 1998.
P. Wesseling, An Introduction to Multigrid
Methods. New York: Wiley, 1992.
K.-P. Hwang, and A.C. Cangellaris, “Effective
permit-tivities for second-order accurate FDTD
equations at dielectric interfaces,” IEEE
Microwave and Wireless Components Letters, 11
(4), April 2001, pp. 158-160.
E. Luo, and H. O. Kreiss, “Pseudospectral vs.
finite difference methods for initial value
problems with discontinuous coefficients,” SIAM
J. Sci. Comput., 20, 1999, pp. 148-163.
J. Nadobny, et al., “A high-resolution
interpolation at arbitrary interfaces for the FDTD
method,” IEEE Trans. Microwave Theory and
Techniques, 46 (11), November 1998, pp. 1759-
X. Zhang, and K.K. Mei, “Time-domain finite
difference approach to the calculation of the
frequency-dependent characteristics of microstrip
discontinuities,” IEEE Trans. Microwave Theory
and Techniques, 36(12), December 1988, pp.
-1787.
C.J. Railton, and J.P. McGeehan, “Analysis of
microstrip with rectangular and trapezoidal
conductor cross sections,” IEEE Trans.
Microwave Theory and Techniques, 38 (8),
August 1990, pp. 1017-1022.
A. Reineix, and B. Jecko, “Analysis of microstrip
patch antennas using finite difference time
domain method,” IEEE Trans. Antennas and
Propagation, 37 (11), November 1989, pp. 1361-
K.S. Nikita, et al., “A study of uncertainties in
modeling antenna performance and power
absorption of a cellular phone user,” IEEE Trans.
Microwave Theory and Techniques, 48 (12),
December 2000, pp. 2676-2685.
D. Popovic, and M. Okoniewski, “Effective
permittivity at the interface of dispersive
dielectrics in FDTD,” IEEE Microwave and
Wireless Components Letters, 13 (7), July 2001,
pp. 265-267.