Study on Channel Characteristics and Performance of Liver‐Implanted Wireless Communications

This chapter aims to clarify the channel characteristics of the liver‐implanted wireless communications at ultrawideband (UWB) range. Firstly, to check the viability of the implementation of the liver‐implanted wireless communication links at UWB range, the measurements and simulations are done using simplified multilayer human‐equivalent phantoms. Next, the chapter investigates the characteristics of liver‐implanted channel at the 4.5–6.5 GHz of UWB range with the consideration of organ movements caused by respiration along with human individuality. The effect of antenna misalignment on the channel characteristics is then examined. Consequently, the chapter compares the path losses (PLs) of the in‐body to off‐body (IN2OFF) scenarios with the PLs of the in‐body to on‐body (IN2ON) scenario. The channel performances of the liver‐implanted communication system for the IN2ON and the IN2OFF scenarios in terms of link budget are evaluated numerically for both the male and female digital model cases.