Summary
International Symposium on Antennas and Propagation
2010
Session Number:4FD4
Session:
Number:4FD4-2
Input impedance characteristics of fixed type of transceivers in intra-body communication
Fukuro KOSHIJI, Ken SASAKI, Kohji KOSHIJI,
pp.-
Publication Date:2010/11/23
Online ISSN:2188-5079
Summary:
As electronic devices become smaller, people may begin to "wear" electronic devices instead of carrying them [1]. A communication method which uses human body as part of the transmission medium, which will be called "intra-body communication" hereafter, may become a new ManMachine interface because transmission path is established only when the user touches another device. Studies on intra-body communication originated from Zimmerman’s pioneering work on intra-body transmission were carried out at MIT in 1995 [2]. And intra-body communication is one of the promising data transmission methods for constructing Body Area Network (BAN) or Bodycentric Network (BCN). Since electrical signal propagates mainly through the human body, power consumption is smaller and transmission is less susceptive to eavesdropping [3], [4]. Fig.1 shows communication form of the intra-body communication, (a) Intra-person, (b) Among several people, and (c) Between person and fixed type of device. As shown in Fig.1 (c), a fixed type of the transceiver can be the other side of the wearable type of the transceiver in intra-body communication. An electrode is a key device in intra-body communication system since electrodes are analogous to antennas in airborne wireless communication system. Therefore, the input impedance characteristics of the electrodes are one of important issues. However, nobody has addressed the issues on the impedance characteristics of the fixed type of the transceivers, although there are a few study reports which are related to wearable type [5]. In this paper, we focus on the fixed type of the transceivers in intra-body communication and investigate the input impedance characteristics of electrodes.