Electrode-based implanted HBC channel characterization and SAR analysis

This summary paper investigates the transmission channel gain and the specific absorption rate (SAR) for implanted HBC based on the galvanic-coupled implantable electrodes, to explore the suitability of human body tissue for a galvanic implanted HBC wireless communication. Based on numerical simulation and phantom measurement, the influence of the electrode length and inter-electrode distance on the channel gain and SAR has been studied. In the HBC frequency range of interest of 5MHz-50MHz, the frequency doesn’t have a noticeable effect on the channel gain. Channel transmission characteristics for different distance have been shown to be similar for different electrode dimensions. With larger transmission distance, the channel gain is decreasing. Larger implanted electrode demonstrates the relative better channel gain as well as lower localized SAR peak.