Modeling of the handshake channel and characteristic analysis

Human body communication technology with human biological tissue as a communication medium provides a new way for wireless communication. However, the current research on human body communication technology is limited to single body communication. This paper expands the application of human body communication technology through the study of two-person handshake communication. First, the impedance and size of the transmitter and receiver were discussed to reduce the influence of the transmitter and receiver on path loss. Then, the effects of palm contact areas on path loss was analyzed in the ultra-wide band (UWB) high and human body communication (HBC) low bands. Finally, the safety of human communication technology was evaluated based on whether the local maximum specific absorption rate (SAR) reached the international limit. In this paper, the path loss was calculated at different communication distances with the optimal parameters of the transmitter and receiver. Under the same communication distance, with the decrease in the contact area of two people’s palms, the path loss of UWB and HBC bands gradually decreases. By comparing SAR values in different frequency bands, it was found that communication through the human body is safe, and the SAR in HBC is smaller than that in UWB. Furthermore, it is less affected by changes in the palm contact area.