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Published on: May 2, 2018
Analysis of specific absorption rate and current density in an energy transmission system for a wireless capsule
Kenji Shiba1, Tomohiro Nagato, Toshio Tsuji
1Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan. shiba@bsys.hiroshima-u.ac.jp
Abstract:
This paper reports on the electromagnetic influences on the analysis of biological tissue surrounding a prototype energy transmission system for a wireless capsule endoscope. Specific absorption rate (SAR) and current density were analyzed by electromagnetic simulator in a model consisting of primary coil and a human trunk including the skin, fat, muscle, small intestine, blood and backbone. SAR and current density as a function of frequency and output power were analyzed. The SAR was below the basic restrictions of the International Commission on Non-Ionizing Radiation Protection (ICNIRP). At the same time, the results for current density show that the influence on biological tissue was lowest in the 300-400 kHz range, indicating that it was possible to transmit energy safely up to 100 mW.
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