In-vivo terahertz EM channel characterization for nano-communications in WBANs

This paper presents an analytical study concerning nanoscale networks operating at the Terahertz frequency. The paper investigates the path loss and absorption coefficients of a simplified human model within wireless body area networks (WBANs). Numerical results indicated that the path loss rises with increased distance and frequency. It was found that the path loss difference across the THz band ranging between 0.1 THz and 10 THz at a distance of 1mm is around 40 dB, for the various body parts. This is an acceptable value especially in the context of in-vivo nano-communication. At 1 THz, the path loss between 1 mm and 1.5 mm ranges betweenb 36 dB and 40 dB, for the different body parts. The results obtained in this paper verify that electromagnetic (EM) communication is a valid analytical assumption for modeling in-vivo THz nano-communication. This is mainly due to the fact that for distances in the order of millimeters, the path loss at THz is not significantly high.