Dispersion analysis of the three-dimensional complex envelope ADI-FDTD method |
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| Authors: | Changning Ma Zhizhang Chen |
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| Affiliation: | Dept. of Electr. & Comput. Eng., Dalhousie Univ., Halifax, NS, Canada; |
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| Abstract: | In this paper, numerical dispersion properties of the three-dimensional complex envelope (CE) alternate-direction implicit finite-difference time-domain (ADI-FDTD) method are studied. The variations of dispersion errors with propagation direction, ratio of carrier to envelope frequencies, and spatial and temporal steps are presented. It is found that the CE ADI-FDTD scheme have much better accuracy and efficiency over the ADI-FDTD, especially with a higher ratio of carrier to envelope frequencies. Therefore, the CE ADI-FDTD is recommended for use in efficient narrow bandwidth electromagnetic modeling. |
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