Summary
International Symposium on Antennas and Propagation
2012
Session Number:POS1
Session:
Number:POS1-48
Evaluation of SAR around an Implanted Cardiac Pacemaker Caused by Mobile Radio Terminal
Yuta Endo, Kazuyuki Saito, Soichi Watanabe, Masaharu Takahashi, Koichi Ito,
pp.-
Publication Date:2012/10/29
Online ISSN:2188-5079
Summary:
Recently, electromagnetic interference (EMI) of an implanted cardiac pacemaker with a mobile radio terminal has been investigated. Based on these studies, national authorities have recommended that a mobile radio terminal should keep 22 cm from the pacemaker in Japan. More recent studies have investigated the specific absorption rate (SAR) distribution in the human body, particularly around a pacemaker, when a mobile radio terminal is nearby, such as on a crowded train. Here, SAR enhancement around the pacemaker was found by numerical computation with FDTD (finite difference time domain) method. A possible reason of SAR enhancement around the pacemaker inside human body is multiple reflections of EM waves between the surface of a metallic implant and human body. In the previous study, a mobile phone model is designed to resonate at 2 GHz, simulating the third generation mobile phone of CDMA2000 or W-CDMA. Here, 900 MHz band is also widely used in resent mobile phone systems. In this study, SAR around the pacemaker is calculated with mobile phone model resonating at 900 MHz. As a result, local SAR enhancement occured around the pacemaker housing.