A new multilevel subgridding scheme for two-dimensional FDTD method

Shu Hai Sun*, T.m. Choi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


A multilevel finite difference time domain (FDTD) subgridding scheme coupled with interpolation based on finite difference approximation to the Laplacian operator is presented. In order to model a structure with small components using FDTD method, the accuracy of the results can be improved by utilizing a new multilevel FDTD subgridding scheme. In this scheme, an FD-Laplacian interpolation is applied in both the coarse main grids and the subgrids to further reduce the error. The validation of the scheme is tested by computing the resonant frequencies of two cavities and solving a scattering problem. The results are compared with solutions for traditional FDTD and other FDTD subgridding schemes published in the literature.

Original languageEnglish
Pages (from-to)1025-1028
Number of pages4
JournalIEEE Transactions on Magnetics
Issue number2 II
StatePublished - 1 Mar 2004


  • FDTD
  • Interpolation
  • Multilevel
  • Subgridding


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