A Novel Unconditionally Stable SS-FDTD Method With Isotropic Dispersion

作者：Ding, Jinchao^*

来源：IEEE Microwave and Wireless Components Letters, 2018, 28(8): 633-635.

DOI：10.1109/LMWC.2018.2843562

• ID-FDTD
• numerical dispersion
• scaling factor
• split-step finite-difference time domain (SS-FDTD)
• weighting factor

A novel unconditionally stable split-step finite-difference time domain (SS-FDTD) method based on an isotropic dispersion finite-difference scheme is introduced. The proposed method reformed the weighting factor and scaling factor of the isotropic-dispersion FDTD for the SS-FDTD method with four substeps, which can generate nearly exact phase velocity for a single frequency. Compared with the conventional four-stage split-step FDTD method, the numerical dispersion error of the new method is significantly reduced even for a large stability factor. The new method is validated by numerical simulations.

• 出版日期2018-8
• 单位电子科技大学