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A wireless sensing platform utilizing ambient RF energy

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4 Author(s)
Parks, A.N. ; Electr. Eng. Dept., Univ. of Washington, Seattle, WA, USA ; Sample, A.P. ; Yi Zhao ; Smith, J.R.

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:

Silicon Monolithic Integrated Circuits in RF Systems (SiRF), 2013 IEEE 13th Topical Meeting on

Date of Conference:

21-23 Jan. 2013