Analysis of the influence of handset phone position on RF exposure of brain tissue.
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Date
2014-11-04
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Abstract
Exposure to mobile phone radio frequency RF electromagnetic fields depends on many different parameters For epidemiological studies investigating the risk of brain cancer linked to RF exposure from mobile phones it is of great interest to characterize brain tissue exposure and to know which parameters this exposure is sensitive to One such parameter is the position of the phone during communication In this article we analyze the influence of the phone position on the brain exposure by comparing the specific absorption rate SAR induced in the head by two different mobile phone models operating in Global System for Mobile Communications GSM frequency bands To achieve this objective 80 different phone positions were chosen using an experiment based on the Latin hypercube sampling LHS to select a representative set of positions The averaged SAR over 10 g SAR10 g in the head the averaged SAR over 1 g SAR1 g in the brain and the averaged SAR in different anatomical brain structures were estimated at 900 and 1800 MHz for the 80 positions The results illustrate that SAR distributions inside the brain area are sensitive to the position of the mobile phone relative to the head The results also show that for 5 10 of the studied positions the SAR10 g in the head and the SAR1 g in the brain can be 20 higher than the SAR estimated for the standard cheek position and that the Specific Anthropomorphic Mannequin SAM model is conservative for 95 of all the studied positions