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A 25.6 W 13.56 MHz wireless power transfer system with a 94% efficiency GaN Class-E power amplifier

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6 Author(s)
Chen, W. ; Industrial Technology Research Institute, Hsinchu, 31040, Taiwan ; Chinga, R.A. ; Yoshida, S. ; Lin, J.
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In this work, we propose the design and implementation of a 13.56 MHz GaN Class-E power amplifier, which takes into account transistor parasitic effects. The design uses the parasitic capacitance of the transistor to replace the charging capacitance, simplifying the circuit structure and obtaining a 93.6% efficiency at output power of 26.8 W. In addition, a wireless power transfer system using the proposed Class-E amplifier is demonstrated, achieving a 73.4% system efficiency when the power delivered to the load is 25.6 W.

Published in:

Microwave Symposium Digest (MTT), 2012 IEEE MTT-S International

Date of Conference:

17-22 June 2012

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