A Study of Near Field Shielding Effect Measurement for Oval Human Phantom Model using the Conductive Material Shield

Author

Nishizawa, Shinichiro ; Wu, Ifong ; Hashimoto, Osamu

Author_Institution

Department of Electrical and Electronic Engineering, Aoyama Gakuin University, Chitosedai Setagayaku 6-16-1, 157-8572 Tokyo, Japan. Tel: (+81)-3584-llll (Ex.23422), Fax: (+81)-3584-1121, E-Mail: s-nishi@ee.aoyama.ac.jP

fYear

2000

fDate

Oct. 2000

Firstpage

1

Lastpage

4

Abstract

In this study, the near field human shield is investigated, which measured the shielding effect of the oval human phantom model, by locating the conductive material shield in front of the phantom model. Also the shielding effect is investigated with the FDTD (Finite Difference Time Domain) method, to confirm the validity of the measurement method. According to the results, it has been shown, that more than 30 dB of the shielding effect is observed for the small gap distances between the shield and phantom model, with the square shield length of 1.0 Â¿. On the other hand, very little and also negative shielding effect observed for the square shield length of 0.25 Â¿. Furthermore, due to the good agreement between the measured and calculated results, the validity of our measurement method is confirmed.

Keywords

Antenna measurements; Anthropometry; Conducting materials; Conductivity measurement; Dipole antennas; Electrical resistance measurement; Humans; Imaging phantoms; Length measurement; Surface resistance;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2000. 30th European

Conference_Location

Paris, France

Type

conf

DOI

10.1109/EUMA.2000.338622

Filename

4139948