Summary
International Symposium on Antennas and Propagation
2010
Session Number:3TE1
Session:
Number:3TE1-2
FDTD Analysis of PEC Wire in Contact with Surface Impedance Boundary Condition
Takuji Arima, Soichi Watanabe, Toru Uno,
pp.-
Publication Date:2010/11/23
Online ISSN:2188-5079
Summary:
The hole-body resonance phenomenon is observed when a human is standing on the flat earth far field exposure of VHF waves[1][2]. In the resonance phenomenon, intensive current is induced. On the other hand, the VHF waves are widely used as broadcasting, radio communication and so on. Therefore the analyzing of the induced current a human body is important. The Green function for the problem was obtained[3][4][5], therefore, the Method of Moment(MOM) can be used for solving this problem. However, the sommerfeld integral is included in this calculation, the sommerfeld integral is not convergence easily, so, it is very difficult to analyze the problem by using MoM. The FDTD method is widely used to analyze a human body model, because, the numerical human data including the electric property of tissue is provided as the Voxel model[6], the Voxel data can be included to FDTD analysis easily[7]. In this paper, we use the FDTD method. Fig.1 shows the scatterer on the flat earth and the FDTD analysis model. In the FDTD analysis, a special boundary is needed to truncate the analysis at the end of computation space. In order to realize flat earth, the PML absorbing boundary which matched with lossy ground is used[8]. However, the PML which matched with lossy ground is needed huge computation resources by comparison with the PML for free space. Furthermore, the PML which matched with lossy ground is very complicated, so, the programming is very difficult. We have proposed efficient modeling method to model flat earth[9]. The method uses surface Impedance boundary condition(SIBC). However, the proposed method was effective for only a case of separate scatteter from ground plane. In this paper, we expand the method for the induced current analysis of the metal wire in contact with the ground plane, and we will propose improving calculation accuracy technique for the problem.