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Title: A stable FDTD subgridding method based on finite element formulation with hanging variables
Authors: Venkatarayalu, N.V. 
Lee, R.
Gan, Y.-B. 
Li, L.-W. 
Keywords: Finite-difference time-domain (FDTD) method
Finite-element time-domain method (FETD)
Hanging variables
Stability analysis
Issue Date: Mar-2007
Citation: Venkatarayalu, N.V., Lee, R., Gan, Y.-B., Li, L.-W. (2007-03). A stable FDTD subgridding method based on finite element formulation with hanging variables. IEEE Transactions on Antennas and Propagation 55 (3 II) : 907-915. ScholarBank@NUS Repository.
Abstract: The finite-element time-domain (FETD) method based on the use of hanging variables to generate nested grids is used as an interface between the coarse and fine grids in the FDTD subgridding method. Since the formulation for treating hanging variables is based on a Galerkin-type intergrid boundary operator, the resulting FDTD subgridding algorithm is guaranteed to be stable. Numerical examples such as the computation of resonant modes of a 3-D rectangular resonant cavity and 2-D TEz scattering by a PEC cylinder and a NACA airfoil are presented to verify the stability and accuracy of the proposed subgridding algorithm. © 2007 IEEE.
Source Title: IEEE Transactions on Antennas and Propagation
ISSN: 0018926X
DOI: 10.1109/TAP.2007.891809
Appears in Collections:Staff Publications

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