A circularly polarized wireless power transfer system for internet-of-things (IoT) applications

Wei Lin, Richard W. Ziolkowski

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

8 Scopus citations

Abstract

A circularly polarized (CP) wireless power transfer (WPT) system is demonstrated. It consists of a high directivity, omnidirectional CP (OCP) antenna array and multiple electrically small Huygens CP (HCP) rectennas. The OCP array emits highly directional CP fields over the entire azimuthal plane. It acts as the wireless power source for charging or powering up surrounding IoT sensors. The OCP array is realized by cascading multiple vertical bars and helical loops to form a set of properly phased, collinear array of electric and magnetic dipoles. Wirelessly powered (WP) sensors are facilitated by combining sensors with HCP rectennas, the latter being a seamless integration of an electrically small HCP antenna with highly efficient rectifier circuits. Both systems were tested and achieved their predicted performance characteristics. These WP sensor systems are ideal candidates for wireless internet-of-things (IoT) applications, for example, in the food and agriculture industries, which are amongst the largest enterprises in Australia.

Original languageEnglish (US)
Title of host publication2020 4th Australian Microwave Symposium, AMS 2020
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728147840
DOIs
StatePublished - Feb 2020
Externally publishedYes
Event4th Australian Microwave Symposium, AMS 2020 - Sydney, Australia
Duration: Feb 13 2020Feb 14 2020

Publication series

Name2020 4th Australian Microwave Symposium, AMS 2020

Conference

Conference4th Australian Microwave Symposium, AMS 2020
Country/TerritoryAustralia
CitySydney
Period2/13/202/14/20

Keywords

  • Antenna array
  • Circular polarization
  • Electrically small antennas
  • Omnidirectional
  • Rectenna
  • Wireless power transfer

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Instrumentation

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