Abstract
This paper presents finite-difference-time-domain (FDTD) calculations of the specific absorption rate (SAR) in realistic head models from exposure to a generic handset working as 1750 Mhz. The head models with different sizes were obtained from the same whole-body model. The purpose of this work is to study whether there is a variation of SAR absorption in the same brain, but the sizes of head models are different. The obtained peak SARs in each of the tissues were averaged over 10 grams of tissue in the shape of cube. It was found that the SAR absorption in human brain is dependent on the size of the head model. The induced SAR in brain tissues in smaller head model is larger than that in larger head model. It suggested that the mobile phone dosimetric analysis in most of the previous literatures which only considered head model in the simulation may overestimate the brain exposure compared to the practical situation that the whole-body exposed to the fields radiated by the mobile phone.
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