A three-dimensional subgridding algorithm for the finite difference time domain (FDTD) method is proposed in this paper. The method is based on interpolation of electric and magnetic current densities. The coarse-fine mesh ratio can be either 1:2 or 1:3. Results of a test model utilizing a lossless cavity excited with a dipole show no tendency of instability after 500000 time steps. The reflection in time domain at the subgridding interface was calculated to test the accuracy of the subgridding algorithm.
K. Xiao et al., "A Three-Dimensional FDTD Subgridding Algorithm Based on Interpolation of Current Density," Proceedings of the IEEE International Symposium on Electromagnetic Compatibility (2004, Santa Clara, CA), vol. 1, pp. 118-123, Institute of Electrical and Electronics Engineers (IEEE), Aug 2004.
The definitive version is available at https://doi.org/10.1109/ISEMC.2004.1350008
IEEE International Symposium on Electromagnetic Compatibility (2004: Aug. 9-13, Santa Clara, CA)
Electrical and Computer Engineering
Electromagnetic Compatibility (EMC) Laboratory
Keywords and Phrases
Magnetic Current Density; Meshes; Subgridding; Symmetry; Algorithms; Current Density; Finite Difference Method; Interpolation; Mathematical Models; Stability; Time Domain Analysis; Electromagnetism; Electric And Magnetic Current Density; FDTD; Linear Interpolation; Finite Difference Methods; Time Domain Analysis; Magnetic Domains; Testing; Geometry; Stability Criteria; Extrapolation; Spline; Electromagnetic Compatibility; Finite Difference Time-Domain Analysis
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