Journal of the Semiconductor & Display Technology (반도체디스플레이기술학회지)

The Korean Society Of Semiconductor & Display Technology (한국반도체디스플레이기술학회)
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Comparative Analysis and Improvement of Transmitting Efficiency in RF Wireless Charging System

RF무선충전 시스템 전송효율 개선 및 비교 분석

  • Son, Myung Sik (Department of Electronic Engineering, Sunchon National University)
  • 손명식 (순천대학교 전자공학과)
  • Received : 2021.11.21
  • Accepted : 2021.12.14
  • Published : 2021.12.31
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Abstract

In this paper, the measurements of received power was shown and compared in two developed 5.8GHz 25W wireless charging systems. One is the system using commercial transmission antenna, and the other is the system using transmission antenna combined with metamaterial. The system combined with metamaterial shows higher received power due to negative reflective index of metamaterial. In addition, a comparative analysis of the systems shows that the transmission efficiency in the systems can decrease the real gain of transmission antenna due to higher side robe of beam pattern. The side robe beams of transmitting antenna interferes transmitted beam with the reflected beams from the bottom region due to the side robes. The failure problems of the RF wireless charging systems are discussed and proposed in order to charge mobile devices through the RF wireless charging system.

Keywords

Acknowledgement

순천대학교 교연비 사업에 의하여 연구되었음.

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