Experimental Characterization of human body communication in shield chamber

Human body communication (HBC) is regarded as a promising communication method in body sensor networks (BSNs). In this paper, we investigated this communication channel characteristics by comprehensive experiments over different frequencies (from 1MHz to 200MHz). We proposed the most mimic real application setup that using the battery powered transceiver with single-electrode, in order to avoid the uncertainty of electromagnetic noise in surrounding environment, we conducted our experiments all in the shielded chamber. Experimental results showed that the electrical coupling dominated the communication manner in lower frequency band, resulting large conductor plane would strengthen the coupling signals. The physiological signals have no influence on the communication link, so as the body temperature and humidity, and postures. The frequency from 24MHz to 30MHz were supposed to be an optimal HBC frequency bands for the relative lower propagation with smaller deviation, and an Industrial, Science and Medical (ISM) band around this frequency band also engaged this frequency band for BSN/BAN applications.