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A wireless sensing platform utilizing ambient RF energy

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4 Author(s)
Aaron N. Parks ; Electrical Engineering Department, University of Washington, Seattle, USA-98195 ; Alanson P. Sample ; Yi Zhao ; Joshua R. Smith

An ambient RF energy harvesting sensor node with onboard sensing and communication functionality was developed and tested. The minimal RF input power required for sensor node operation was -18 dBm (15.8 μW). Using a 6 dBi receive antenna, the most sensitive RF harvester was shown to operate at a distance of 10.4 km from a 1 MW UHF television broadcast transmitter, and over 200 m from a cellular base transceiver station. A complete ambient RF-powered prototype was constructed which measured temperature and light level and wirelessly transmitted these measurements.

Published in:

Wireless Sensors and Sensor Networks (WiSNet), 2013 IEEE Topical Conference on

Date of Conference:

20-23 Jan. 2013