Imagine charging your phone by simply entering a room where a base station uses 144 antennas to shoot out mm waves to 14 antennas embedded inside your phone. These OTA signals are part of Xiaomi’s 5W Mi Air Charge Technology. , Xiaomi says that the system will charge multiple devices at once while the charging waves travel through obstacles on the way to connect with devices. With the rectifier circuit, the 14 antennas in the phone help to convert the mm waves into the energy used to charge the battery in the device.
You might recall that nearly four years ago …