SAR evaluations of mobile phone close to a pacemaker implanted in human body.

Recently, electromagnetic interference (EMI) of an implanted pacemaker with a mobile phone was largely investigated. As for the pacemaker, the Japan National Authorities have recommended to keep the mobile phone in safe distance from the cardiac pacemaker. Meanwhile, evaluation of the interaction between the electromagnetic (EM) wave and human body was in progress. Therefore, the absorption of EM energy to the human body especially around the pacemaker, where the mobile phone was in a chest pocket of the pacemaker holder, was thoroughly evaluated. We provided the calculation of specific absorption rate (SAR) distributions around the pacemaker model that implanted into a rectangular parallelepiped torso model, when a mobile phone model is placed in the vicinity. In addition, the SAR was also experimentally performed to validate the such numerical calculations. We confirmed that SAR distributions could be estimated from the presence or absence of pacemaker model. Moreover, the measurement results of the SAR distribution suited to the calculation, thus its validation was achieved.