Experimental evaluation of hand effects to the specific absorption rate in child head

There are concerns about effects on SAR from mobile phone due to the hand holding devices. In recent years, the antenna design and location have been changed dramatically. SAR distributions are sometimes used as the index of exposure for epidemiological studies including the study for younger generation. Therefore, we experimentally evaluated the hand effects for SAR in child head phantom with several types of the phones. Hand effects on 10 g SAR were negligible for about half of the cases compared to experimental uncertainty. Among the cases the hand effect is not negligible, the cases whose SAR is reduced and increased by the hands are same order.