Radiation Protection Dosimetry Advance Access originally published online on July 9, 2009
Radiation Protection Dosimetry 2009 135(4):226-231; doi:10.1093/rpd/ncp118
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FDTD calculations of SAR for child voxel models in different postures between 10 MHz and 3 GHz
1 Radiation Protection Division, Health Protection Agency, Chilton, Didcot, Oxon OX11 0RQ, UK
2 ETRI, Radio Technology Research Department, Daejeon 305-700, Korea
* Corresponding author: Richard.findlay{at}hpa.org.uk
Received April 6, 2009, amended April 6, 2009, accepted June 15, 2009
Calculations of specific energy absorption rate (SAR) have been performed on the rescaled NORMAN 7-y-old voxel model and the Electronics and Telecommunications Research Institute (ETRI) child 7-y-old voxel model in the standing arms down, arms up and sitting postures. These calculations were for plane-wave exposure under isolated and grounded conditions between 10 MHz and 3 GHz. It was found that there was little difference at each resonant frequency between the whole-body averaged SAR values calculated for the NORMAN and ETRI 7-y-old models for each of the postures studied. However, when compared with the arms down posture, raising the arms increased the SAR by up to 25%. Electric field values required to produce the International Commission on Non-Ionizing Radiation Protection and Institute of Electrical and Electronic Engineers public basic restriction were calculated, and compared with reference levels for the different child models and postures. These showed that, under certain worst-case exposure conditions, the reference levels may not be conservative.