Determination of RF dosimetry caused by mobile phone exposure with FDTD method

In recent years humans are more exposed to human-made fields than natural fields with developing technologies. Especially, widespread of wireless communication technologies in all areas of daily life and getting closer to sensitive organs like brain caused an increase in possible risks and worries about human health. In this study, effects of EM field exposure on human head while using mobile phone have been investigated in detail considering different frequencies, antenna locations, head dimension, dielectric properties of head, usage positions of mobile phone and widespread usage metallic accessories like earrings and glasses. So, an effect of these parameters on SAR values, caused by mobile phone exposure, was determined by controlled experiments. With this aim, dose value in the tissue, for each condition 1 gr and 10 gr spatial-peak SAR values and maximum SAR values were calculated by SEMCAD X software which uses FDTD method. Within the scope of this study, SAR values were calculated in growingup children, who are more sensitive to external impacts than adults, and risk evaluation was done. As a result of findings obtained in the study, it was determined that the most affectional parameter on SAR value was mobile phone usage position. In the cheek position, it was observed a crucial increase compared to tilt position. The increase in dielectric properties of tissues was confirmed as a parameter causing a significant increase in SAR values. Child tissue?s dielectric properties contributed more SAR values when compared to adults?. Although the increase in SAR values due to child?s head dimension was not enough considerable, it was observed that children absorbed higher SAR values with respect to adults because of high dielectric properties. Effects on SAR values in different ratios depending on mobile phone frequency, antenna position, usage of metallic accessories like earrings and glasses were determined. Thus, which parameter is most important and what can be done to minimize the field exposure was defined.