Electromagnetic fields radiated by a cellular phone in close proximity to metallic walls

Author

Dominguez, Hugo ; Raizer, Adroaldo ; Carpes, Walter P., Jr.

Author_Institution

Dept. of Electr. Eng., Univ. Fed. de Santa Catarina, Florianopolis, Brazil

Volume

38

Issue

2

fYear

2002

fDate

3/1/2002 12:00:00 AM

Firstpage

793

Lastpage

796

Abstract

In this paper, we use the transmission line matrix (TLM) method to calculate the specific absorption rate (SAR) in an inhomogeneous model of human head exposed to the near fields irradiated by a mobile phone very close to metallic walls. The cellular phone is modeled as a λ/4 monopole antenna above a rectangular metal box. For computations, two operation frequencies with different radiated powers were selected: a phone model at 835 MHz and 0.6 W, and a phone model at 1800 MHz and 0.125 W. We accomplish a systematic investigation of the change in SAR due to the presence of metallic walls at different orientations and at different distances from the head. The TLM simulation showed that, in some cases, the walls cause significant increases of SAR over the values corresponding to the free-space

Keywords

biological effects of fields; cellular radio; electromagnetic fields; monopole antennas; transmission line matrix methods; 0.125 W; 0.6 W; 1800 MHz; 835 MHz; cellular phone; electromagnetic field; human head; inhomogeneous model; metallic wall; monopole antenna; numerical simulation; rectangular metal box; specific absorption rate; transmission line matrix; Biological system modeling; Cellular phones; Dielectric losses; Electromagnetic fields; Electromagnetic modeling; Humans; Power system modeling; Radio frequency; Telephony; Transmission line matrix methods;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.996205

Filename

996205