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http://dx.doi.org/10.5515/KJKIEES.2011.22.4.407

Analysis of Stability Condition and Wideband Characteristics of 3D Isotropic Dispersion(ID)-FDTD Algorithm  

Kim, Woo-Tae (Department of Electrical and Electronics Engineering, Yonsei University)
Koh, Il-Suek (Department of Electroic Engineering, Inha University)
Yook, Jong-Gwan (Department of Electrical and Electronics Engineering, Yonsei University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.22, no.4, 2011 , pp. 407-415 More about this Journal
Abstract
The stability condition and wideband characteristics of 3D ID-FDTD algorithm which has low dispersion error with isotropic dispersion are presented in this paper. 3D ID-FDTD method was proposed to improve the defect of the Yee FDTD such as the anisotropy and large dispersion error. The published paper calculated the stability condition of 3D ID-FDTD algorithm by using numerical method, however, it is thought that the examples were not sufficient to verify the stability condition. Thus, in this paper, various simulations are included in order to hold reliability under the conditions that the plane wave propagation is assumed with a single frequency and a wideband frequency. Also, the 3D ID-FDTD algorithm is compared to those that have the similar FDTD algorithm with ID-FDTD such as Forgy's method and non-standard FDTD method in a wideband. Finally, the radar cross section(RCS) for the large sphere with high dielectric constant is calculated.
Keywords
FDTD; Isotropic Dispersion; Rcs; Stability Condition;
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