An FDTD Modeling of Semi-Infinite Lossy Ground for Electromagnetic Scattering Problem

Takuji ARIMA  Soichi WATANABE  Toru UNO  Masaharu TAKAHASHI 

Publication
B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)  Vol.J92-B  No.9  pp.1457-1463
Publication Date: 2009/09/01
Online ISSN: 1881-0209
Print ISSN: 1344-4697
Type of Manuscript: Special Section PAPER (Special Issue on Simulation and Analysis Methods for Antennas and Propagation Technologies)
Category: 
Keyword: 
FDTD method,  PML,  surface impedance boundary condition, 

Full Text(in Japanese): PDF(367KB)

Summary: 
In order to model semi-infinite ground, the PML 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.