Regular Paper

[OPTICAL REVIEW Vol. 21, No. 5 (2014) 614-620]
© 2014 The Japan Society of Applied Physics

Signal Measurement System for Intra-Body Communication Using Optical Isolation Method

Kazuki MATSUMOTO1, Jun KATSUYAMA1, Ryo SUGIYAMA1, Yasuaki TAKIZAWA1, Seita ISHII1, Mitsuru SHINAGAWA1, and Yuichi KADO2

1Faculty of Science and Engineering, Hosei University, Koganei, Tokyo 184-8584, Japan
2Department of Electronics, Kyoto Institute of Technology, Kyoto 606-8585, Japan

(Received January 9, 2014; Accepted May 19, 2014)

In this paper, we describe an induced signal measurement on the human body for developing a high-performance transceiver of an intra-body communication system. It is important to isolate awearable transceiver from an electrical instrument for precise measurement. We have developed a probe system using an optical isolation method including a laser diode, photo-diode, and optical fiber. The probe system can be successfully applied to the precise measurement of a receiving signal power at a wearable transceiver. We verify that the experimental results agree with the simulation results based on our previous channel model of intra-body communication.

Key words: intra-body communication, wearable transceiver, laser diode, photo-diode, optical fiber, circuit simulation, channel model, human body, ubiquitous computing


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