Journal of the Semiconductor & Display Technology (반도체디스플레이기술학회지)

The Korean Society Of Semiconductor & Display Technology (한국반도체디스플레이기술학회)
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An Analysis of Voltage Multiplier Circuits for Smart Phone RF Wireless Charging

스마트폰 RF 무선충전을 위한 전압 체배기 회로 분석

  • Son, Myung Sik (Department of Electronic Engineering, Sunchon National University)
  • 손명식 (순천대학교 전자공학과)
  • Received : 2021.05.03
  • Accepted : 2021.06.18
  • Published : 2021.06.30
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Abstract

A 5.8-GHz 1W wireless power transmission system was used for charging a smart phone. The voltage of one RF power receiver with antenna was not enough for charging. Several power receivers for charging a smart phone was connected serially. The voltage of several RF power receivers are highly enough for charging a smart phone within 50cm. However, the lack of current from small capacitances of RF-DC converters is not suitable for charging smart phone. It means very long charging time. In this paper, the voltage multiplier circuits for RF-DC converters were analyzed to increase the current and voltage at the same time to reduce the charging time in smartphone RF wireless charging. Through the analysis of multiplier circuits, the 7-stage parallel multiplier circuit with voltage-doubler units are suitable for charging the smartphone, which supplies 5V and 700mA at 3V@5.8GHz.

Keywords

Acknowledgement

순천대학교 교연비 사업에 의하여 연구되었음.

References

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