5.8 GHz Microwave Wireless Power Transmission System Development and Transmission-Efficiency Measurement

5.8 GHz 마이크로파 무선전력전송 시스템 개발 및 전송효율측정

  • Lee, Seong Hun (Department of Electronic Engineering, Sunchon National University) ;
  • Son, Myung Sik (Department of Electronic Engineering, Sunchon National University)
  • Received : 2014.12.01
  • Accepted : 2014.12.22
  • Published : 2014.12.31

Abstract

Previous studies have selected wireless power transmission system using 2.45 GHz of ISM band, but the researches for 5.8 GHz microwave wireless power transmission have been relatively rare. The 5.8 GHz has some advantages compared with 2.45 GHz. Those are smaller antenna and smaller integrated system for RFIC. In this paper, the 5.8 GHz wireless power transmission system was developed and transmission efficiency was measured according to the distance. A transmitter sent the amplified microwaves through an antenna amplified by a power amplifier of 1W for 5.8 GHz, and a receiver was converted to DC from RF through a RF-DC Converter. In the 1W 5.8GHz wireless power transmission system, the converted currents and voltages were measured to evaluate transmission efficiency at each distance where LED lights up to 1m. The RF-DC Converter is designed and fabricated by impedance matching using full-wave rectifier circuit. The transmission-efficiency of the system shows from 1.05% at 0cm to 0.095% at 100cm by distance.

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