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Reducing the Numerical Dispersion in the FDTD Analysis by Modifying Anisotropically the Speed of Light

✍ Scribed by Kosuke Suzuki; Tatsuya Kashiwa; Yoshio Hosoya

Book ID
102159820
Publisher
John Wiley and Sons
Year
2002
Tongue
English
Weight
338 KB
Volume
85
Category
Article
ISSN
8756-663X

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✦ Synopsis

Abstract

In FDTD analysis, one of the problems is numerical dispersion caused by the discretization of time and space. In a previous publication, the present authors generalized a speed‐of‐light correction method previously applied only to isotropic meshes so that it could be applied to an anisotropic mesh. However, in the previously reported correction method the speed of light was corrected isotropically. Therefore, the error compression was small in the aniso‐tropic mesh. In this paper, a correction method is proposed in which more compression of the phase error than in the previous method is possible in an anisotropic lattice. By applying the new method to a two‐dimensional nonuniform mesh, the effectiveness of the method is demonstrated. © 2001 Scripta Technica, Electron Comm Jpn Pt 2, 85(1): 50–58, 2002

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✍ Ki-Bok Kong; Jong-Sung Kim; Seong-Ook Park 📂 Article 📅 2007 🏛 John Wiley and Sons 🌐 English ⚖ 306 KB

## Abstract We propose a new adaptive alternating‐direction implicit finite‐difference time‐domain (ADI‐FDTD) to reduce the anisotropy in the numerical phase velocities. The proposed form has two anisotropic parameters on the first order terms of the time step and one parameter on the second order