Body-Resonance Human Body Powering

The demand for perpetual operation of body-connected devices, along with an exponential reduction in the size of computing units, has highlighted the need for powering solutions for wearables. Utilizing the human body as an energy-efficient medium for wireless communication in Electro-Quasistatic (EQS) and body-coupled power transfer has gained attention. Moreover, revealing the advantages of the Body Resonance (BR) regime, recent studies demonstrated the potential for designing power-efficient systems. However, a comparison of transferred power between EQS and BR has not been studied. In this paper, we present a comparative analysis of the variation in received power between EQS and BR. Highlighting the benefits of wirelessly charging wearables by transferring power, we analyze a Machine-to-Wearable scenario involving a ground-connected power transmitter and a portable receiver. The results show that the BR regime improves received power (i.e., ~100 µW over >1 m) by 200X  compared to the EQS scenario.