TFET-Based Power Management Circuit for RF Energy Harvesting

David Cavalheiro, Francesc Moll, Stanimir Valtchev

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

This paper proposes a Tunnel FET (TFET)-based power management circuit (PMC) for ultra-low power RF energy harvesting applications. In contrast with conventional thermionic devices, the band-to-band tunneling mechanism of TFETs allows a better switching performance at sub-0.2 V operation. As a result, improved efficiencies in RF-powered circuits are achieved, thanks to increased rectification performance at low power levels and to the reduced energy required for a proper PMC operation. It is shown by simulations that heterojunction TFET devices designed with III-V materials can improve the rectification process at received power levels below-20 dBm (915 MHz) when compared to the application of homojunction III-V TFETs and Si FinFETs. For an available power of-25 dBm, the proposed converter is able to deliver 1.1 ${\mu }\text{W}$ of average power (with 0.5 V) to the output load with a boost efficiency of 86%.

Original languageEnglish
Article number7742921
Pages (from-to)7-17
Number of pages11
JournalIEEE Journal of the Electron Devices Society
Volume5
Issue number1
DOIs
Publication statusPublished - 1 Jan 2017

Keywords

  • Energy harvesting
  • power management
  • radio-frequency
  • tunnel FET
  • UHF
  • ultra-low power

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