... the team came up with “quasistatic cavity resonance (QSCR)”, where magnetic fields are generated to deliver kilowatts of power to receivers. These receivers can be connected to a device, like a phone or fan, to supply it with power.
The room built by Disney Research was lined with aluminum panels. In its center was a copper tube between the floor and the ceiling, with a current running through it. Fifteen capacitors in the pole are used to set a resonant frequency in the room and isolate electric fields from a signal generator, which outputs at 1.32 MHz. A uniform magnetic field is then run through the room at the same frequency.
The receivers use a coil of wire to resonate at the same frequency, providing power to a device. The researchers were able to deliver about 1,900 watts with an efficiency of 40 to 95 percent. ...
See the full story here: https://www.iflscience.com/disney-researchers-make-wireless-power-transfer-breakthrough-40433?fbclid=IwAR1_6xky8oxbmHCArrDkbD2w2uUeOLJyENvEvlYJg4PMD7YjAbnOyNCmPL8