A battery-less, self-sustaining RF energy harvesting circuit with TFETs for μw power applications

David Cavalheiro, Francesc Moll, Stanimir Valtchev

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper proposes a Tunnel FET (TFET) power management circuit for RF energy harvesting applications. In contrast with conventional MOSFET technologies, the improved electrical characteristics of TFETs promise a better behavior in the process of rectification and conversion at ultra-low power (μW) and voltage (sub-0.25 V) levels. RF powered systems can not only benefit from TFETs in front-end rectifiers by harvesting the surrounding energy at levels where conventional technologies cannot operate but also in the minimization of energy required by the power management circuit. In this work we present an energy harvesting circuit for RF sources designed with TFETs. The TFET controller emulates an adequate impedance at the output of the rectifier in order to allow maximum transfer of power from the RF source to the input of the boost converter. The output load is activated once the output capacitor reaches a voltage value of 0.5 V. The results show an efficiency boost of 89 % for an output load consuming 1 μW with an available RF power of-25 dBm.

Original languageEnglish
Title of host publication14th IEEE International NEWCAS Conference, NEWCAS 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781467389006
DOIs
Publication statusPublished - 20 Oct 2016
Event14th IEEE International NEWCAS Conference, NEWCAS 2016 - Vancouver, Canada
Duration: 26 Jun 201629 Jun 2016

Conference

Conference14th IEEE International NEWCAS Conference, NEWCAS 2016
CountryCanada
CityVancouver
Period26/06/1629/06/16

Keywords

  • Energy Harvesting
  • Power Management
  • Radio-Frequency
  • Tunnel FET
  • Ultra-Low Power

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  • Cite this

    Cavalheiro, D., Moll, F., & Valtchev, S. (2016). A battery-less, self-sustaining RF energy harvesting circuit with TFETs for μw power applications. In 14th IEEE International NEWCAS Conference, NEWCAS 2016 [7604751] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/NEWCAS.2016.7604751