Browse > Article

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

Son, Myung Sik (Department of Electronic Engineering, Sunchon National University)
Publication Information
Journal of the Semiconductor & Display Technology / v.20, no.2, 2021 , pp. 29-33 More about this Journal
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
Microwave; Wireless power transmission system; Wireless charging; Smart phone;
Citations & Related Records
연도 인용수 순위
  • Reference
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.   DOI
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 Spice Parameters, Datasheet of HSMS-286x, AVAGO Technology.
5 Voltage multiplier Circuits, https://en.wikipedia.org/wiki/Voltage_multiplier, Wikipedia.
6 Pspice simulation tool, OrCAD ver.10.5, Cadence Design Systems, Inc.