We have covered many cool drones here. None of them are powered wirelessly. Sam M’s idea looks brilliant though. It involves using wireless power to get a drone to fly. This particular quadrotor “consumes anywhere between 5-10W when it hovers with a shield on.” As the developer explains, this set up was not designed for high efficiency but it does show how such a system could work.
This quadrotor is powered completely via magnetic induction. Here is what the developer had to say:
The transmitter was implemented on a two layer PCB and was driven by a load independent Class EF inverter. The inverter operates at 13.56 MHz and uses a single GaN transistor from GaN Systems. The receiving coil consists a single turn of copper tape which was wound around the shield of the quadrotor. The receiver board consists of a Class D rectifier and a DC/DC converter.
More info is available here.