Absorbed Radiation (SAR value) in a Human Head

The increasing use of wireless equipment has also increased the amount of radiation energy to which human bodies are exposed. A common property that measures absorbed energy is the SAR value, (specific absorption rate) to determine the amount of radiation that human tissue absorbs.

The human head geometry is the same geometry (SAM Phantom) provided by IEEE, IEC and CENELEC from their standard specification of SAR value measurements. The original geometry was imported into COMSOL Multiphysics. In addition, the model samples some material parameters with a volumetric interpolation function that estimates the variation of tissue type inside the head.

This model studies how a human head absorbs a radiated wave from an antenna, and the temperature increase that this causes.

Slice and boundary (head) plots showing the logarithm of the SAR value. The boundary plot on the plate shows the surface current density.