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Electromagnetic dosimetry for adult and child models within a car: multi-exposure scenarios

Published online by Cambridge University Press:  29 November 2011

Louis-Ray Harris ,
Maxim Zhadobov ,
Nacer Chahat  and
Ronan Sauleau
Louis-Ray Harris
Affiliation:
University of Technology, Kingston, Jamaica.
Maxim Zhadobov*
Affiliation:
Institute of Electronics and Telecommunications of Rennes (IETR), UMR CNRS 6164, University of Rennes 1, Rennes, France.
Nacer Chahat
Affiliation:
Institute of Electronics and Telecommunications of Rennes (IETR), UMR CNRS 6164, University of Rennes 1, Rennes, France.
Ronan Sauleau
Affiliation:
Institute of Electronics and Telecommunications of Rennes (IETR), UMR CNRS 6164, University of Rennes 1, Rennes, France.
*
Corresponding author: Dr. M. Zhadobov Email: [email protected]
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Abstract

This paper deals with the numerical dosimetry for adult and children models exposed to CW signals of several wireless communication systems (UMTS, WiMax, and Bluetooth) within a partly shielded environment represented by a realistic car model. More than 20 mono- and multi-source exposure scenarios are considered. Computational results demonstrate that, for all considered exposure scenarios, the specific absorption rate (SAR) is at least 40 times (whole-body average) and 10 times (local SAR) lower than the exposure limits fixed by the International Commission on Non-Ionizing Radiation Protection (ICNIRP). The whole-body average SAR values for children are found to be typically 1.1–1.3 times higher than those of adults. Under several exposure scenarios, the local SAR in the limbs of children models is 2–3 times higher than corresponding values in adult models. The power density distributions within the car have been also analyzed for one, two, and three simultaneously emitting devices. The results show that the homogeneity of the power density distribution increases with increasing number of simultaneously operating transmitters. These data suggest that the use of several wireless communication devices within a car leads to exposure levels that are several orders of magnitude below international exposure limits, even for the multi-exposure scenarios for both adult and children models.

Keywords

Electromagnetic dosimetryFinite-difference time-domain (FDTD) methodMulti-exposureChildren human body modelsPartly shielded environmentSpecific absorption rate (SAR)
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 3 , Issue 6 , December 2011 , pp. 707 - 715
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2011

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