What we know today for wireless charging is the Qi standard, which allows you to recharge without cables, but still need there to be a physical contact between the charging base and the device, using a system of induction by copper coils. But this week the Federal Communications Commission (FCC), the us agency that is in charge of approving the electronic devices in the face of its marketing, has granted certification to a wireless charger that actually works at a distance using radio waves in the band 5.850 GHz-5.875 GH, which is just above the band reserved for wlan 5.8 GHz.
The charger of the california-based company Energous is called WattUp Mid Field and consists of a transmitter that is kept in standby mode until it detects a device equipped with a compatible receiver and that does not already have the battery charged, at which time it begins to transform energy in the radio waves that send it towards the particular position where you have located the receiver. The certified technology reaches up to 90 centimeters and is intended to place the transmitter, for example, in a table of work and that all the devices that we leave in it, or even that we are using in the vicinity are charging without need, or cables, or place them on any specific surface.
Energous also has another technology called WattUp Far Field, without certification even, that reaches several meters and that could be used to charge all devices in a room, but that is not yet certified. The company suggests that the transmitters may be chargers that are enchufen to the current, or they may be embedded in televisions or monitors.
The problem, of course, is that the devices that you want to recharge must be equipped with a compatible receiver, although receivers would work with any of the two technologies. According to the company, the receiving system could be included in mobile phones, tablets, smartwatches and other wireless devices such as keyboards, speakers and mice. Also make sure that is small enough to be able to replace the batteries in the hearing aids.
The system is controlled by software that can be used through the web or with an app, and that allows you to set the priority of each device at the time of recharge, specify how much energy we want to transmit to each device, to establish schedules of load, etc, The ecosystem created by Energous is open, allowing any transmitter from any manufacturer would work with any receiver from any other manufacturer. Displayed the system at the next CES show in Las Vegas which will be held between the 9 and the 12 of January.