Cooperative Integration of RF Energy Harvesting and Dedicated WPT for Wireless Sensor Networks

Hao Zhang, Yong Xin Guo, Zheng Zhong, Wen Wu

Research output: Contribution to journalArticlepeer-review

76 Scopus citations

Abstract

With an advance of semiconductor technology, RF energy harvested from ambient becomes more and more promise to facilitate low-power electronics. However, such energy is too low to activate a high-power module, constraining its widespread in wireless sensor networks (WSNs). To embed an ambient energy harvesting into WSNs, its cooperative integration with a dedicated wireless power transfer (WPT) is proposed. Therefore, low-power electronics can be sustained by ambient energy, while high-power modules can be activated by the dedicated WPT. A low-threshold rectifier is exploited to capture and rectify all matched ambient energy, while reflecting almost unmatched dedicated incidence. A low-loss and small-size circulator is employed to channel the two various energy flows, enabling a compact rectenna. The proposed integration is theoretically analyzed and experimentally validated, which is suitable for WSNs applications.

Original languageEnglish
Article number8667726
Pages (from-to)291-293
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Volume29
Issue number4
DOIs
StatePublished - Apr 2019
Externally publishedYes

Keywords

  • Ambient energy harvesting
  • circulator
  • wireless power transfer (WPT)
  • wireless sensor networks (WSNs)

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