Effect of user´s posture and device´s position on human body communication with multiple devices

Transmission characteristics of human body communication assuming actual situation are still not well understood. In this paper, the electric field distributions and transmission characteristics of HBC were evaluated using multiple wearable receivers and models of different posture. As a result, Differences caused by the models of different posture were small enough considering individual differences of real human bodies. On the other hand, the receiver position had significant effect on the transmission characteristic. Moreover, it was found that the transmission characteristics were improved by 15 dB to adjust port impedance of the devices to the absolute value of the input impedance in the electrodes.