Researchers at Georgia Institute of Technology have demonstrated - at the IEEE conference July 6 - technology capable of harnessing ambient electromagnetic energy that pervades our modern world. By taking advantage of the transmitters that are already covering modern cities power is extracted from thin air. In a sense turning mobile phone base stations, tv transmitters and radio station transmitters into micro power stations. While this technology only provides very small amounts of power it is enough to power simple sensors and devices, eventually as the technology develops more advanced electronics may be powered, we may eventually see self-powered bumper stickers telling us to back the f off.
“There is a large amount of electromagnetic energy all around us, but nobody has been able to tap into it,” said Manos Tentzeris, a professor in the Georgia Tech School of Electrical and Computer Engineering who is leading the research. “We are using an ultra-wideband antenna that lets us exploit a variety of signals in different frequency ranges, giving us greatly increased power-gathering capability.” Read the full article »»»»