DOSIMETRIC VARIATION IN HUMAN EXPOSURE TO 20 MHZ-3 GHZ ELECTROMAGNETIC FIELDS DUE TO CHANGES IN DIELECTRIC PROPERTIES.

Specific energy absorption rate (SAR) is often used to assess human exposure to electromagnetic radiation. SAR is strongly related to incident field parameters, characteristics of the body exposed, ground effects and other factors. In this study, changes in dielectric properties, due to health and age status, were taken into account in the simulation of SAR in a Chinese male model exposed to eight orthogonal plane-wave configurations at the frequency range of 20 MHz-3 GHz. The results show that changes in dielectric properties can cause variations in SAR. Moreover, the variation in SAR was influenced by frequency, electric polarisation and incident direction. Therefore, it is of great significance to distinguish the frequency and exposure configuration when a change in dielectric properties is applied in the evaluation of SAR. In addition, more general cases with a random change in dielectric properties should be performed, which are more realistic.