Equivalent Circuit of Intrabody Communication Channels Inducing Conduction Currents Inside the Human Body

The physical channels establishing intrabody communications were first treated as capacitive circuits by Zimmerman. In Zimmerman´s model, the human body is approximated as a perfect conductor. The equivalent-circuit parameters of the perfect conductor models can be strictly obtained based on electrostatic analyses; however, the perfect conductor models cannot be applied if conduction currents inside the human body are not negligible. In the present paper, a theory of the equivalent circuit for lossy conductors is described, and the physical mechanism of the communication channels inducing conduction currents inside the human body is addressed.