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http://dx.doi.org/10.5515/JKIEES.2011.11.3.161

Wireless Energy Transmission High-Efficiency DC-AC Converter Using High-Gain High-Efficiency Two-Stage Class-E Power Amplifier  

Choi, Jae-Won (Department of Electronic Engineering, Soongsil University)
Seo, Chul-Hun (Department of Electronic Engineering, Soongsil University)
Publication Information
Journal of electromagnetic engineering and science / v.11, no.3, 2011 , pp. 161-165 More about this Journal
Abstract
In this paper, a high-efficiency DC-AC converter is used for wireless energy transmission. The DC-AC convertter is implemented by combining the oscillator and power amplifier. Given that the conversion efficiency of a DC-AC converter is strongly affected by the efficiency of the power amplifier, a high-efficiency power amplifier is implemented using a class-E amplifier structure. Also, because of the low output power of the oscillator connected to the input stage of the power amplifier, a high-gain two-stage power amplifier using a drive amplifier is used to realize a high-output power DC-AC converter. The high-efficiency DC-AC converter is realized by connecting the oscillator to the input stage of the high-gain high-efficiency two-stage class-E power amplifier. The output power and the conversion efficiency of the DC-AC converter are 40.83 dBm and 87.32 %, respectively, at an operation frequency of 13.56 MHz.
Keywords
Wireless Energy Transmission; DC-AC Converter; High-Gain High-Efficiency Power Amplifier; Class-E; Drive Amplifier;
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