This study involved transferring power wirelessly through inductive coupling. The goal was to create a receiver device capable of powering a rectifying circuit and charging a capacitor while being at least 20 mm away from the transmitter device. This device should also be capable of receiving power when separated by non-conductive mediums other than air. The study was successful at transmitting power through an RF transmitter into an RF receiver at voltage ranges of 1V — 14V and ranges of 0cm — 20cm. It was able to charge an 80 nF capacitor to 8.39 V and had a fall time of 573 ms.
Blair, Justin D.
"Collecting and Storing Wireless Power from a RF Source,"
Journal of the Microelectronic Engineering Conference: Vol. 18
, Article 2.
Available at: http://scholarworks.rit.edu/ritamec/vol18/iss1/2