Researchers harvest ambient electromagnetic energy as power source

摘要

Researchers at the Georgia Institute of Technology have found a way to capture and harness ambient energy from such sources as radio and television transmitters, cell-phone networks, and satellite-communications systems. They believe that the technique could provide a new way to power networks of wireless sensors, microprocessors, and communications chips."There is a large amount of electromagnetic energy all around us, but nobody has been able to tap into it," says Manos Tentzeris, a professor in the school of electrical and computer engineering who is leading the research. "We are using an ultrawideband antenna that lets us exploit a variety of signals in different frequency ranges, giving us greatly increased power-gathering capability."