Effect of quality factor on determining the optimal position of a transmitter in wireless power transfer using a relay

Kisong Lee, Sung Ho Chae

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

In this letter, the optimal placement of a transmitter is investigated under a given arrangement of a relay and a receiver for nonradiative wireless power transfer. Specifically, a closed-form equation is derived for the optimal coupling coefficient between the transmitter and the relay using an equivalent circuit model. Based on this theoretical analysis, it is found that the quality factor of the transmitter has a great effect on determining its optimal placement. In particular, the transmission efficiency can be improved by locating the resonator with a smaller quality factor (e.g., transmitter or receiver) closer to the relay. In order to support the validity of the analysis, the resonators, including the relay, receiver, and three different types of transmitters, are experimentally designed and fabricated. It is shown that our analytical results are well matched with the measured ones in various settings.

Original languageEnglish
Article number7902148
Pages (from-to)521-523
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Volume27
Issue number5
DOIs
StatePublished - May 2017

Keywords

  • Equivalent circuit model
  • Optimal configuration
  • Relay resonator
  • Wireless power transfer (WPT)

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