Study on the electric field distributions around whole body model with a wearable device using the human body as a transmission channel

In the near future, we will begin to attach wearable devices, and we will meet the ubiquitous computing society in Weiser, M. However, currently there are little methods for these personal devices to exchange data directly. We want to exchange the data of the wearable devices without physical constraint like an external wire connection that may easily be tangled. The solution for networking these personal devices has been proposed as Personal Area Networks (PANs) which uses the human body as a transmission channel in Zimmerman, T.G., et al, (1995). Many studies have been made on the development of such devices so far, however, most of the researches have been conducted by researchers who just want to utilize the fact and practically a little physical mechanisms have been researched until recently by Fukumoto, M., et al, (1997). In this paper, the authors clarify the electromagnetic field distributions of the near-field intrabody communication devices from the view point of the interaction between the electromagnetic wave and the human body by using the FDTD method. In the FDTD calculation, a realistic high resolution whole-body model of Japanese adult male with average height and weight in Nagaoka, T., et al, (2004) is used, because there has been little study that tried to clarify the electromagnetic field distributions around the full scale human body with the wearable devices. Moreover, simple block model of the whole body is introduced, and electric field distribution of the simple body is compared to that of the realistic one. Moreover, we demonstrate the electric field distributions around simple whole body when the positions are changed.