ScholarWorks@숙명여자대학교

초록

To supply power to implantable systems, wireless power transfer (WPT) is an attractive solution. There are two types of WPT receivers (RXs), voltage-mode (VM) RX [1], [2] and current-mode (CM) RX [3], [4]. The VM-RX is suitable when the coupling coefficient (k12) between the transceiver (TX) and the RX coils is sufficiently high. However, in many practical cases, the k12 is low because of a considerably small implanted RX coil and/or the relatively long distance between the TX and RX coils, as shown in Fig. 32.1.1 (top). In this case, the CM-RX is more suitable. To receive a lower power from the TX, the CM-RX stores power in its LC tank by resonance and transfers the energy to a battery when the energy reaches the optimal level.