Abstract
AbstractIn order to reduce the phase error in FDTD analysis, the NS‐FDTD method has been conceived by Cole. However, numerical dispersion characteristics and stability condition were not presented by Cole; only the definition for cubic meshes was given. In the present paper, the three‐dimensional NS‐FDTD method is extended to rectangular meshes and the numerical dispersion characteristics and stability condition are derived. From the analysis of the stability condition, it is found that the stability condition of the present method is larger than that in the FDTD method. From the analysis of the numerical dispersion characteristics, it is shown that the method has better accuracy than the FDTD method for both cubic and rectangular meshes. © 2003 Wiley Periodicals, Inc. Electron Comm Jpn Pt 2, 86(5): 66–76, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/ecjb.1122
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