A Lumped Circuit Model for Implantable Body-Coupled Channel

The implantable body-coupled channel (IBCC) method, which utilizes high-conductivity biological tissue as the medium for transferring power or data to implants, offers several distinct advantages over traditional methods. However, the current research on its model remains limited. In this paper, we propose a lumped circuit model of the implantable body-coupled channel to analyze its transmission mechanism. To evaluate the model, the channel loss is measured using a vector network analyzer (VNA) for different receiver electrode types and transmission distances. The simulated results have been validated to be consistent with the measured results across the various experimental conditions. Furthermore, the proposed model demonstrates higher accuracy compared to the existing circuit model, which can provide enhanced guidance for IBCC's further application in the field of implantable bioelectronics.