At Disney Research, a team of scientists including Matthew Habalko, Mohsen Shahmohammadi, and Alencon Semple have developed a wireless power transmission system that recharges electronic devices indoors. The method is called "quasi-static resonant cavity" (QSCR).
To demonstrate its effect, a 5 x 5 meter room was specially built in the laboratory. Inside it, magnetic waves were generated, constantly charging several mobile phones and energizing the ventilation and interior lighting of the room.
The idea of wireless transmission of energy has been exciting the minds of scientists for more than a century. Suffice it to recall the grandiose experiments of Nikola Tesla back in the 90s of the XIX century, during which he demonstrated wireless lighting.
The QSCR method consists of inducing an electric current in metallized walls and ceilings, which creates a uniform magnetic field. As a result, energy is transferred to the receiving coils operating at the same resonant frequency as the magnetic fields. The induction of currents in the structure is carried out through separated capacitors, which isolate potentially dangerous electric fields.
Despite the use of metal-clad walls in the experimental room, scientists believe the design could be simplified in the future. For this, special wall panels or conductive paint are suitable.