Wireless powering of single-chip systems with integrated coil and external wire-loop resonator

摘要

A procedure for inductive wireless powering of single-chip systems is presented. An integratedspiral coil is used as the power receiving component. An external resonator formed by a wireloopinductor connected to a capacitor is placed in close proximity to the chip. The sinusoidalmagnetic field generated at a distant transmitting loop is amplified by the resonator. The presentapproach enables delivering power in the order of tens of microwatts to a few milliwatts atdistances longer than 10 cm using a frequency of 13.5 MHz. The integrated coil used here can befabricated with any integrated circuit fabrication technology.