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Wavefront-ray grid FDTD algorithm
Date
2016-01-01
Author
Ciydem, Mehmet
Koç, Seyit Sencer
Metadata
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Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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A finite difference time domain algorithm on a wavefront-ray grid (WRG-FDTD) is proposed in this study to reduce numerical dispersion of conventional FDTD methods. A FDTD algorithm conforming to a wavefront-ray grid can be useful to take into account anisotropy effects of numerical grids since it features directional energy flow along the rays. An explicit and second-order accurate WRG-FDTD algorithm is provided in generalized curvilinear coordinates for an inhomogeneous isotropic medium. Numerical simulations for a vertical electrical dipole have been conducted to demonstrate the benefits of the proposed method. Results have been compared with those of the spherical FDTD algorithm and it is showed that numerical grid anisotropy can be reduced highly by WRG-FDTD.
Subject Keywords
Finite difference time domain
,
Wavefront
,
Ray
,
Numerical dispersion
,
Grid anisotropy
,
Directional propagation
URI
https://hdl.handle.net/11511/35096
Journal
TURKISH JOURNAL OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCES
DOI
https://doi.org/10.3906/elk-1309-240
Collections
Department of Electrical and Electronics Engineering, Article
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BibTeX
M. Ciydem and S. S. Koç, “Wavefront-ray grid FDTD algorithm,”
TURKISH JOURNAL OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCES
, pp. 874–881, 2016, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/35096.