Whole body exposure at 2100 MHz induced by plane wave of random incidences in a population

Emmanuelle Conil; Abdelhamid Hadjem; Aimad El Habachi; J. Wiart

doi:10.1016/j.crhy.2010.11.007

Interactions between radiofrequencies signals and living organisms

Whole body exposure at 2100 MHz induced by plane wave of random incidences in a population
[Estimation du niveau d'exposition d'une population à une onde plane à 2100 MHz d'incidence aléatoire]

Emmanuelle Conil ^1,² ; Abdelhamid Hadjem ^1,² ; Aimad El Habachi ^1,² ; J. Wiart ^1,²

¹ Orange Labs, R&D, 38-40, rue du Général Leclerc, 92794 Issy-les-Moulineaux, France
² WHIST Lab, Issy-les-Moulineaux, France

Comptes Rendus. Physique, Volume 11 (2010) no. 9-10, pp. 531-540.

Résumé
Abstract

Le niveau d'exposition des personnes aux ondes électromagnétiques est influencé par différents paramètres comme la morphologie, la posture ou la fréquence de l'onde. De nombreuses études ont été menées afin de quantifier l'influence de ces différents paramètres. Très souvent, la direction d'arrivée de l'onde est fixée de façon déterministe. Or en réalité, les ondes proviennent de directions aléatoires autour du plan horizontal. Dans cette étude, les ondes incidentes se situent dans le plan horizontal et la fréquence utilisée est 2100 MHz. La direction d'arrivée de l'onde incidente est considérée comme une variable aléatoire. Une étude de dosimétrie numérique a été menée sur le fantôme Visible Human pour construire un modèle réduit permettant de prédire le débit d'absorption spécifique (DAS) corps entier en fonction de l'angle d'incidence et de paramètres morphologiques. Le modèle réduit induit une erreur de $4 %$ en moyenne sur le DAS corps entier. Ce modèle est ensuite appliqué à d'autres fantômes anthropométriques (10 adultes dont 3 femmes) pour une incidence fixée. L'erreur moyenne sur les 10 modèles est de $10 %$ sur le DAS corps entier. Finalement, le modèle réduit est utilisé de façon à estimer la distribution du DAS corps entier dans une population donnée. Une base de données anthropométriques de plus de 3500 adultes a été utilisée afin de construire la distribution du DAS corps entier induit par une onde plane à 2100 MHz d'incidence aléatoire dans le plan horizontal.

In this article, the whole body exposure induced by plane wave coming from a random direction of arrival is analyzed at 2100 MHz. This work completes previous studies on the influence of different parameters on the whole body exposure (such as morphology, frequency or usage in near field). The Visible Human phantom has been used to build a surrogate model to predict the whole body exposure depending on the highlighted surface of the phantom and on the direction of arrival of the incident plane wave. For the Visible Human, the error on the whole body averaged Specific Absorption Rate (SAR) is on average 4%. The surrogate model is applied to other 3D anthropomorphic phantoms for a frontal incidence with an averaged error of 10%. The great interest of the surrogate model is the possibility to apply a Monte Carlo process to assess probability distribution function of a population. A recent French anthropometric database of more than 3500 adults is used to build the probability distribution function of the whole body SAR for a random direction of arrival.

Publié le : 2010-11-01

DOI : 10.1016/j.crhy.2010.11.007

Keywords: Dosimetry, Finite-difference time-domain method, Highlighted surface, Plane waves, Specific absorption rate
Mot clés : Dosimétrie, Méthode des différences finies en domaine temporel, Surface en évidence, Ondes planes, Taux d'absorption spécifique

Affiliations des auteurs :

Emmanuelle Conil ^{1, 2} ; Abdelhamid Hadjem ^{1, 2} ; Aimad El Habachi ^{1, 2} ; J. Wiart ^{1, 2}

¹ Orange Labs, R&D, 38-40, rue du Général Leclerc, 92794 Issy-les-Moulineaux, France
² WHIST Lab, Issy-les-Moulineaux, France

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     author = {Emmanuelle Conil and Abdelhamid Hadjem and Aimad El Habachi and J. Wiart},
     title = {Whole body exposure at 2100 {MHz} induced by plane wave of random incidences in a population},
     journal = {Comptes Rendus. Physique},
     pages = {531--540},
     publisher = {Elsevier},
     volume = {11},
     number = {9-10},
     year = {2010},
     doi = {10.1016/j.crhy.2010.11.007},
     language = {en},
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Emmanuelle Conil; Abdelhamid Hadjem; Aimad El Habachi; J. Wiart. Whole body exposure at 2100 MHz induced by plane wave of random incidences in a population. Comptes Rendus. Physique, Volume 11 (2010) no. 9-10, pp. 531-540. doi : 10.1016/j.crhy.2010.11.007. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2010.11.007/

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