반도체디스플레이기술학회지 (Journal of the Semiconductor & Display Technology)

한국반도체디스플레이기술학회 (The Korean Society Of Semiconductor & Display Technology)
권호 표지

스마트폰 RF 무선충전을 위한 전압 체배기 회로 분석

An Analysis of Voltage Multiplier Circuits for Smart Phone RF Wireless Charging

  • 손명식 (순천대학교 전자공학과)
  • Son, Myung Sik (Department of Electronic Engineering, Sunchon National University)
  • 투고 : 2021.05.03
  • 심사 : 2021.06.18
  • 발행 : 2021.06.30
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초록

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.

키워드

과제정보

순천대학교 교연비 사업에 의하여 연구되었음.

참고문헌

  1. Biao Hu, Hao Li, Tianming Li, Haiyang Wang, Yihong Zhou, Xiaoyun Zhao, Xin Hu, Xuekun Du, Yulong Zhao, Xiang Li, Tian Qi, Mohamed Helaoui, Wenhua chen, Fadhel Ghannouchi, "A long-distance high-power microwave wireless power transmission system based on asymmetrical resonant magnetron and cyclotron-wave rectifier", Energy Reports 7, pp.1154-1161, 2021. https://doi.org/10.1016/j.egyr.2020.12.026
  2. Seong Hun Lee and Myung Sik Son, "5.8GHz 25W Microwave Wireless Power Transmission System Development and Measurement", Journal of the Semiconductor & Display Technology, Vol.16, No.1, pp. 21-24, 2019.
  3. Seong Hun Lee and Myung Sik Son, "RF-DC Voltage Multiplier Design and Fabrication for 5.8GHz Microwave Wireless Power Transmission", Journal of the Semiconductor & Display Technology, Vol.16, No.2, pp. 1-4, 2017.
  4. Pspice simulation tool, OrCAD ver.10.5, Cadence Design Systems, Inc.
  5. Spice Parameters, Datasheet of HSMS-286x, AVAGO Technology.
  6. Voltage multiplier Circuits, https://en.wikipedia.org/wiki/Voltage_multiplier, Wikipedia.