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Wireless Ambient Radio Power (WARP): Harvesting ambient radio energy sources to power remote sensors

Recently, during the International Symposium on Pervasive Displays (PerDis 2013) hosted at Google’s Mountain View campus, University of Washington Electrical Engineering graduate student +Aaron Parks presented ongoing research into the development of remote sensor units powered by the ambient radio frequency (RF) signals that are ubiquitous in urban environments. 

As power is the primary constraint in such sensors, Parks and colleagues demonstrated a proof of concept by powering electrophoretic (http://goo.gl/WJWEq) displays with ambient RF energy harvested from TV broadcast and cellular base transceiver station (BTS) signals. With a local user interface, onboard physical sensors, and a radio link, the ambient RF-powered WARP units require no wired connections, enabling battery-free operation and long lifetime and allowing for a wide range of potential applications.

Led by University of Washington Associate Professor and Sensor Systems Laboratory Principal Investigator +Joshua R Smith  (http://goo.gl/I49AJl), the WARP project was the recipient of the Google Faculty Research Award (http://goo.gl/6XFmi) in 2011 and 2012. Google is proud to support this work, and we look forward to further collaboration with all recipients of the Faculty Research Awards.

To learn more about WARP, read Parks’ paper at http://goo.gl/y5Nhu9, and watch the short video below.
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They're gonna need some efficient antennas on those devices.
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