Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/24555
Title: Specific absorption rate variation in a brain phantom due to exposure by a 3G mobile phone: Problems in dosimetry
Authors: Behari, J
Nirala, Jay Prakash
Keywords: Mobile phone exposures;Monopole probe;Phantom material Specific absorption rate
Issue Date: Dec-2013
Publisher: NISCAIR-CSIR, India
Abstract: A specific absorption rate (SAR) measurements system has been developed for compliance testing of personal mobile phone in a brain phantom material contained in a Perspex box. The volume of the box has been chosen corresponding to the volume of a small rat and illuminated by a 3G mobile phone frequency (1718.5 MHz), and the emitted radiation directed toward brain phantom .The induced fields in the phantom material are measured. Set up to lift the plane carrying the mobile phone is run by a pulley whose motion is controlled by a stepper motor. The platform is made to move at a pre-determined rate of 2o per min limited up to 20o. The measured data for induced fields in various locations are used to compute corresponding SAR values and inter comparison obtained. These data are also compared with those when the mobile phone is placed horizontally with respect to the position of the animal. The SAR data is also experimentally obtained by measuring a rise in temperature due to this mobile exposures and data compared with those obtained in the previous set. To seek a comparison with the safety criteria same set of measurements are performed in 10 g phantom material contained in a cubical box. These results are higher than those obtained with the knowledge of induced field measurements. It is concluded that SAR values are sensitive to the angular position of the moving platform and are well below the safety criteria prescribed for human exposure. The data are suggestive of having a fresh look to understand the mode of electromagnetic field -bio interaction.
Page(s): 1079-1085
URI: http://hdl.handle.net/123456789/24555
ISSN: 0975-1009 (Online); 0019-5189 (Print)
Appears in Collections:IJEB Vol.51(12) [December 2013]

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