TY - GEN
T1 - A novel subgridding technique for unconditionally stable time domain method
AU - Huang, Zhenyu
AU - Pan, George
PY - 2010
Y1 - 2010
N2 - For inhomogeneous electromagnetic (EM) problems, subgridding techniques have been introduced [1, 2], in which coarse grid is used for homogeneous background, while fine grid is employed in the denser area. In the traditional approach, the interface between the two areas is considered as the boundary condition by each other. Recently, a new subgridding technique called HSG (Huygens sub-griding) method is proposed by Berenger [3], in which the physical connection between two areas is realized by means of Huygens surfaces. Instead of EM components, equivalent currents on the Huygens surface become the commuter between the coarse and fine grid regions. In a macroscopic view, EM fields are teleported from the coarse grid region (source domain) to the fine grid one (problem domain) via equivalent currents. The two major features HSG achieved are arbitrarily large spatial ratio and insignificant spurious reflection from the interface. However the drawback of the late time instability restricts its applicability. The oscillation period associated with this phenomenon depends on the spatial size of the source domain and the ratio between time step and the Courant limit.
AB - For inhomogeneous electromagnetic (EM) problems, subgridding techniques have been introduced [1, 2], in which coarse grid is used for homogeneous background, while fine grid is employed in the denser area. In the traditional approach, the interface between the two areas is considered as the boundary condition by each other. Recently, a new subgridding technique called HSG (Huygens sub-griding) method is proposed by Berenger [3], in which the physical connection between two areas is realized by means of Huygens surfaces. Instead of EM components, equivalent currents on the Huygens surface become the commuter between the coarse and fine grid regions. In a macroscopic view, EM fields are teleported from the coarse grid region (source domain) to the fine grid one (problem domain) via equivalent currents. The two major features HSG achieved are arbitrarily large spatial ratio and insignificant spurious reflection from the interface. However the drawback of the late time instability restricts its applicability. The oscillation period associated with this phenomenon depends on the spatial size of the source domain and the ratio between time step and the Courant limit.
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U2 - 10.1109/APS.2010.5562005
DO - 10.1109/APS.2010.5562005
M3 - Conference contribution
AN - SCOPUS:78349290838
SN - 9781424449682
T3 - 2010 IEEE International Symposium on Antennas and Propagation and CNC-USNC/URSI Radio Science Meeting - Leading the Wave, AP-S/URSI 2010
BT - 2010 IEEE International Symposium on Antennas and Propagation and CNC-USNC/URSI Radio Science Meeting - Leading the Wave, AP-S/URSI 2010
T2 - 2010 IEEE International Symposium on Antennas and Propagation and CNC-USNC/URSI Radio Science Meeting - Leading the Wave, AP-S/URSI 2010
Y2 - 11 July 2010 through 17 July 2010
ER -