Analysis of dependence of signal propagation loss on poses in intra-body communication

Near-field coupling communication (NFCC) is a technology that uses the surface area of the human body as a communication path using the megahertz band. We have already evaluated the basic mechanism connected with NFCC on a phantom that was electrically regarded as a human body. The shape of the human body was not considered in the evaluation since the shape of the phantom was simply rectangular and parallel piped. However, it is important to evaluate what effects the body shape has on the signal loss to enable practical use. We evaluated signal loss characteristics according to positions and poses of the human body. The experimental results revealed that signal loss on the human body was dependent on these positions and poses. We propose appropriate positions for where the wearable transceiver is worn on the body to ensure reliable communication with any poses.