Title :
A Stable FDTD Subgridding Method Based on Finite Element Formulation With Hanging Variables
Author :
Venkatarayalu, Neelakantam V. ; Lee, Robert ; Gan, Yeow-Beng ; Li, Le-Wei
Author_Institution :
Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore
fDate :
3/1/2007 12:00:00 AM
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
Keywords :
Galerkin method; finite difference time-domain analysis; finite element analysis; numerical stability; FDTD subgridding method; FETD; Galerkin-type intergrid boundary operator; finite difference time-domain; finite-element time-domain method; hanging variable; stability; Automotive components; Electromagnetic scattering; Finite difference methods; Finite element methods; Gallium nitride; Laboratories; Mesh generation; Resonance; Stability; Time domain analysis; Finite-element time-domain method (FETD); finite-difference time-domain (FDTD) method; hanging variables; stability analysis;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2007.891809
