부산대학교 도서관

This paper represents the numerical analysis of Specific Absorption Rate (SAR) and temperature distribution within the eyes of realistic child head model exposed to mobile phone radiation at the frequency of 4G. The SAR and temperature distribution are obtained by numerical solutions of the equation of electromagnetic wave propagation as well as the bioheat equation. The values of SAR and temperature distribution are shown for different biological tissues of the eyes during exposure to electromagnetic radiation from a mobile phone. As electromagnetic properties of tissues depend on the electromagnetic waves' frequency, the value of SAR and temperature will be different for different tissues. For the purpose of this research, a realistic 3D model of a child's head has been created. Maximum absorption of electromagnetic energy occurs in the surface layers of the child head model, whereby this value exceeds the maximum allowed limits. This is the case when the radiation source is positioned closest to the head model. An increase in temperature was observed in the biological tissues and organs closest to the radiation source, i.e. the mobile phone. As the distance between the mobile phone and the child head increases, the temperature decreases, but slower than the SAR values. Keywords: biological tissue; mobile phone; numerical models; specific absorption rate; temperature change
1 INTRODUCTION One of the most prominent modes of smart phone use among children is Internet surfing. New functions available on smart phones, such as social network applications with online [...]