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1 results

  • Ultra-low-power energy harvesting using power-optimized waveforms

  • Christopher R. Valenta, Gregory D. Durgin
  • Journal:
    Wireless Power Transfer / Volume 3 / Issue 1 / March 2016
    Published online by Cambridge University Press:
    22 October 2015, pp. 1-8
    Print publication:
    March 2016

  • Power-optimized waveforms (POWs) are the enabling technology for realizing an internet-of-things (IoTs). An IoT will require billions or trillions of sensors, which must rely on passive, backscatter communication to facilitate the wireless transfer of information. Passive, backscatter sensors are uniquely suited for an IoT because of their ease of installation, low-cost, and lack of potentially toxic batteries. POW's primary benefit is that they can greatly improve the energy-harvesting efficiency of passive sensors, which increases their range and reliability. An overview of POWs is presented followed by measured results validated by a theoretical model and computer simulations. These measured results conducted at 5.8 GHz demonstrate the highest reported efficiency of a low-power, microwave energy-harvesting circuit of 26.3% at an input power of −10.2 dBm when using an excitation signal with a peak-to-average-power ratio of 12.