INVENTORS

摘要

The energy demands of wire-less devices have held back the spread of cheap sensors that could be monitoring our homes, the environment, and physical infrastructure such as bridges. Shyam Gollakota has an ingenious solution-a way for these wireless devices to operate without batteries. Gollakota's prototypes use the fog of radio noise that surrounds us from TV stations, cell towers, and other sources as an energy supply and a means of communicating. By absorbing and reflecting those ambient signals, the devices can send messages to one another and even link to the Internet.