JSTS:Journal of Semiconductor Technology and Science

The Institute of Electronics and Information Engineers (대한전자공학회)
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Magnetic Resonant Coupling Based Wireless Power Transfer System with In-Band Communication

  • Kim, Sun-Hee (Department of Electronics Engineering, Ewha Womans Univ.) ;
  • Lim, Yong-Seok (Department of Electronics Engineering, Ewha Womans Univ.) ;
  • Lee, Seung-Jun (Department of Electronics Engineering, Ewha Womans Univ.)
  • Received : 2013.05.09
  • Accepted : 2013.11.05
  • Published : 2013.12.31
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Abstract

This paper presents a design of a wireless power transfer system based on magnetic resonant coupling technology with in-band wireless communication. To increase the transmission distance and compensate for the change in the effective capacitance due to the varying distance, the proposed system used a loop antenna with a selectable capacitor array. Because the increased transmission distance enables multiple charging, we added a communication protocol operated at the same frequency band to manage a network and control power circuits. In order to achieve the efficient bandwidth in both power transfer mode and communication mode, the S-parameters of the loop antennas are adjusted by switching a series resistor. Our test results showed that the loop antenna achieved a high Q factor in power transfer mode and enough passband in communication mode.

Keywords

Acknowledgement

Supported by : National Research Foundation of Korea (NRF)

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