Computation of specific absorption rate for four-layered human head model exposed to HF electromagnetic waves

We have computed effective specific absorption rate (SAR) and change in the temperature for a four-layered human-head model when exposed to electromagnetic radiations from a common antenna in mobile phones. Human head is modeled as having four layers of skin, fat, bone, and brain. A realistically shaped human-head model is used in contrast to an oval-shaped model. The SAR and change in temperature is computed as a function of the distance of the antenna from the head at 900 and 1200 MHz. It was found that increasing the distance of the antenna from the head from 1 to 2 cm can significantly decrease the absorbed power in different tissues.