Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/11165
Title: Low numerical dispersion two-dimensional (2,4) ADI-FDTD method
Authors: Sun, MK
Tam, WY 
Keywords: Altenating direction implicit finite-difference time-domain (ADI-FDTD)
High-order
Numerical dispersion
Issue Date: 2006
Publisher: Institute of Electrical and Electronics Engineers
Source: IEEE transactions on antennas and propagation, 2006, v. 54, no. 3, p. 1041-1044 How to cite?
Journal: IEEE transactions on antennas and propagation 
Abstract: The numerical dispersion of the alternating direction implicit finite-difference time-domain (ADI-FDTD) method can be improved by approximating the spatial derivatives using the four-point centered finite-difference formula. However, the improvement is not significant when the time step size increases. In this paper, we develop a low numerical dispersion 2-D (2,4) ADI-FDTD method, by which the finite-difference operators are determined by minimizing the error terms in the numerical dispersion relation. The numerical dispersion error shown to be significantly reduced for any time-step size. In addition, there is an alternative method that results in zero numerical dispersion errors at a specified propagation angle. The numerical dispersion relation of the proposed method is investigated theoritically and compared with standards ADI-FDTD method as well as with the conventional FDTD method.
URI: http://hdl.handle.net/10397/11165
ISSN: 0018-926X
EISSN: 1558-2221
DOI: 10.1109/TAP.2006.869940
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