On Friday, 29 January, Xiaomi announced the Mi Air Charge, which can remotely charge your devices without cables or pads. The Mi Air Charge is capable of charging multiple devices simultaneously. “Today, we enter a true wireless charging era,” Xiaomi said in a blog post. Xiaomi claimed that the Mi Air Charge can charge multiple devices at the same time. Also, the charging efficiency can not be affected by any physical obstacle.
Xiaomi’s Mi Air Charge works on two main concepts; device tracking and energy transmission. Xiaomi has achieved these by developing an in-house technology. For the accurate detection of the smartphone location, Xiaomi has developed a built-in isolated charging pile that has five phase interference antennas.
When it comes to transmission of energy wirelessly, Xiaomi developed a phase control array composed of 144 antennas that transmit millimeter-wide waves directly to the phone through beamforming. On the other hand, for the smartphone, Xiaomi has also developed a miniaturized antenna array. The antenna array contains a built-in beacon antenna and receiving antenna array.
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The beacon antenna helps in broadcasting the position of the smartphone by consuming very little power. The receiving antenna contains 14 antennas that convert the millimeter-wave signal emitted by the charging unit into electric energy through the rectifier circuit.
Currently, the Mi Air charge is capable of 5-watt remote charging for multiple devices at a radius of several meters. “Soon our living room devices, including speakers, desk lamps, and other small smart home products, will all be built upon a wireless power supply design, completely free of wires, making our living rooms truly wireless,” said Xiaomi.
Xiaomi Spokesperson Statement
However, Xiaomi spokesperson clarifies on Twitter about the Mi Air Charge. She said that this technology is just a demo and not going to roll out as a consumer product this year.
