Most phones, tablets and laptops still rely on plugs and sockets, with wireless charging requiring devices to be kept in close contact with a charging pad. New technology developed at Aalto University could be a key step towards true wireless charging for consumer electronics.
While many researchers are working on “free-position wireless charging” (which would allow devices to be moved from set charging points) the most common solutions involve complex control and detection functions. A transmitter must first detect a device presence and position to be able to charge it. This is usually achieved with cameras or sensors, adding bulk and cost to the device.
The new wireless charging device takes an entirely different approach by creating power transfer channels in all directions around it and automatically tuning channels when receiving devices are in motion. Multiple devices equipped with a complementary receiver can simultaneously be charged or directly...