Pathloss Calculation for Fat-Intra Body Communication Using Poynting Vector Theory

Recently, Fat-based Intra-Body Communication (Fat-IBC) has been proposed and studied in terms of its reliability in simulation and laboratory settings. We, in this work, try to address another important aspect of communication, namely pathloss, in the context of fat-IBC. The present paper provides numerical and experimental modeling of pathloss through the fat layer using the Poynting Vector theory and the Multi-layer dielectric Green’s function (MGF). To calculate the pathloss based on Poynting vector theory, the electromagnetic field distribution through the involved media should be known. The present paper exploits the EM fields using MGF theory or commercial software CST Microwave Studio 2019. Finally, experimental measurement is done on ex-vivo tissue made of porcine skin, fat and muscle at the frequency range of 5 GHz – 6 GHz. The average measured pathloss is around 5.5 dB/cm which has good compliance with the theoretical Poynting vector pathloss estimation.