An Efficient Approach for Modeling Semi-infinite Lossy Ground in Electromagnetic Scattering Problem using FDTD Analysis

摘要

In order to model semi-infinite ground in FDTD calculation, the PML absorbing boundary condition which matches lossy ground is used in general FDTD analysis. But, the huge computer resources are required, because, PML needs many additional variables. In this study, an efficient numerical modeling of lossy ground plane for FDTD analysis of induced current is proposed. The proposed method uses Surface Impedance Boundary Condition (SIBC). In this paper, we calculate the induced current of the metal wire standing on the realistic ground plane, and from results, it was shown that the proposed method was effective to model semi-infinite ground.