On-Body Channel Characteristics Based on Variation of Human Tissue Properties

Effects of tissue property in the on-body communications were investigated in this paper. First, to simplify the human body modeling, homogeneous human models were constructed for different frequencies and their accuracies were discussed. It turned out that from the path loss point of view, muscle equivalent model provides a good approximation for low frequency propagation while skin equivalent model is more accurate at high frequency. Then, the variabilities of path loss for the belt-to-chest link as the result of tissue property changes were examined. The mean and standard deviation of path loss exponent were presented from which the limits of path loss can be determined. Results showed that tissue property has larger impact at low frequency.