Evaluation of the real-life exposure due to mobile phones in an indoor environment

The peak spatial-average specific absorption rate (SAR) of a mobile phone measured at maximum power level under laboratory condition is not representative of the real-life exposure. The real-life SAR is strongly dependent on the over-the-air (OTA) performance of the mobile phone as well as the propagation condition. An indoor environment is herein considered for the evaluation of the real-life exposure from three mobile phones. It is shown that on average the mobile phone with the best so-called SAROTA index-expressed as the ratio between the SAR and total radiated power (TRP) - exhibits the lowest real-life exposure.