Power for future devices could be harvested directly from Wi-Fi signals
Wireless power is often seen as the holy grail for mobile devices, allowing charging without being connected to a power source - or in some cases, without the need for an internal battery at all. Researchers have had a breakthrough in making this a reality - publishing results inNature- demonstrating advances in harvesting power from Wi-Fi signals and developing a rectenna (radio wave harvesting antenna) that’s thin and flexible - only a few atoms thick....