A design of high efficiency class-E power amplifier for wireless power transfer system

In this paper, class-E power amplifier (PA) with automatic power control loop and load compensation circuit is presented. The transmitted power is controlled by adjusting the signal applied to the gate of the power control transistor. In addition, a parallel capacitor is also controlled to enhance t...

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Bibliographic Details
Main Authors: HyungGu Park, Joon-Sung Park, YoungGun Pu, Seung-Ok Lim, Yeon-Kuk Moon, Sun-Hee Kim, Kang-Yoon Lee
Format: Conference Proceeding
Language:English
Subjects:
Capacitors
Class-E
Control systems
Load Compensation
Load management
Power Amplifier
Power amplifiers
Power control
Power generation
Wireless communication
Wireless Power Transfer
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Summary:In this paper, class-E power amplifier (PA) with automatic power control loop and load compensation circuit is presented. The transmitted power is controlled by adjusting the signal applied to the gate of the power control transistor. In addition, a parallel capacitor is also controlled to enhance the efficiency and compensate for the load variation. This chip is implemented in a 0.35 μm BCD technology, and provides the output power control range of 10-30.2 dBm. The maximum power efficiency of the power amplifier is 71.5%.
DOI:10.1109/IMWS2.2011.6027207