Analysis and Modeling of 2.5~6.0 GHz Signal Propagation Channel for Human Body Implant

To validate the validity of in human body communication in 2.5~6.0 GHz signal, the path loss characteristic and Specific Absorption Rate (SAR) are investigated by using a 3D ElectroMagnetic (EM) simulator based on Finite Integration Technique (FIT) and a high-resolution 3D electromagnetic model of human body based on CT and MRI segmented images taken from living human males. A numerical statistical model for path loss characteristic is presented. Experiment results substantiate the feasibility and security of human body implant communication in 2.5~6.0 GHz band, and a modificatory classical power law function can well characterize the distance dependent path loss for inside body, the Root-Mean-Square Error (RMSE) of EM simulation and numerical model calculation results is 2.78 dB and 8.30 dB at 2.5 GHz and 6.0 GHz, respectively.