Researchers at the University of Tokyo have developed a room that charges all electronic devices within itself.
In the future, the habit of charging all electronic devices overnight will no longer be necessary thanks to wireless charging. Researchers in Japan have made a new breakthrough in this direction: they have developed a system that can turn an entire room into a wireless charger.
Today, wireless charging is advertised as the most convenient way to charge an electronic device, but this is not always the case: most of the time the gadget must lie on a rug or a certain surface, so it is not very convenient to use it and charge it at the same time.
In the new work, the authors tried to get around this problem, they made a whole room around which you can freely move and charge devices. They placed capacitors in the walls that create magnetic fields.
This technology is known as quasi-static resonance: lumped capacitors that are in walls have conductive surfaces. Therefore, a three-dimensional magnetic field appears in the room and, at the same time, electric fields remain trapped inside the capacitors. Coil receivers in phones or light bulbs can pick up this magnetic field and receive energy.
The team tested the system in a 3 x 3 x 2m room and found that the power delivery efficiency was at least 50% for almost the entire space. The signal was strongest when the receiver coil was at right angles to the magnetic field. The power can be as high as 50W or more, according to the team.