Xiaomi, the third largest smartphone manufacturer in the world, today presented the “Mi Air Charge technology”, with which several devices can be supplied with 5 W “within a radius of several meters”, as the Chinese giant customers to a “real era of wireless charging ”.
The company has developed an isolated charging stack itself, in which five phase interference antennas are integrated, with which “the location of the smartphone can be precisely determined”.
A phase control array consisting of 144 antennas transmits millimeter-wide waves directly to the phone using beamforming. The company will also be able to work with intelligent watches, bracelets and other wearable devices “in the near future”.
A company spokesman said Xiaomi, which previously introduced 80W and 120W wireless charging technology, will not use this new system for consumer products this year.
This is how the company described the mechanics of its new technology:
On the smartphone side, Xiaomi has also developed a miniaturized antenna array with an integrated “beacon antenna” and “receiving antenna array”. The beacon antenna sends position information with low power consumption. The receiving antenna array, consisting of 14 antennas, converts the millimeter wave signal emitted by the charging stack into electrical energy via the rectifier circuit in order to convert the sci-fi charging experience into reality.
Currently, Xiaomi remote charging technology can download 5 watts for a single device within a radius of several meters. Apart from that, multiple devices can be charged at the same time (each device supports 5 watts), and even physical obstacles do not affect charging efficiency.
The news site XDA-Developers reported on Friday that a Motorola executive was also demonstrating a prototype remote charging system that appears to provide power over the air. Not a word on when its technology will hit consumer devices as well.
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