HyungGu Park Joon-Sung Park YoungGun Pu Yongnam Kim #Kang-Yoon Lee Department of Electronic Engineering, Konkuk University Seoul, Korea,

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Presentation transcript:

HyungGu Park Joon-Sung Park YoungGun Pu Yongnam Kim #Kang-Yoon Lee Department of Electronic Engineering, Konkuk University Seoul, Korea, Unistream Co., Ltd. Gyeonggi, Korea 微波工程 / 期末口試報告 A Design of Class-E Power Amplifier for Wireless Power Transfer System with Automatic Power Control Loop and Load Compensation Circuit Southern Taiwan University 學生 : 張冠程課程老師 : 陳文山教授 1

Outline Introduction Architecture Experimental Results Conclusion References Southern Taiwan University 2

Introduction 無線傳輸系統 A block diagram of wireless power transfer system is shown Figure 1. In order to increase the power efficiency, the power level is detected in th receiver and required power is supplied by the class-E power amplifier without maximum power transfer. In addition, it should be insensitive to the variation of the load. Southern Taiwan University 3

Architecture(1/2) Proposed schematic of class-E power amplifier Southern Taiwan University 4

Architecture(2/2) Schematic of capacitor bank Southern Taiwan University 5

Experimental Results(1/2) Layout of class-E power amplifier The proposed class-E amplifier is fabricated using the 0.35 μm BCD CMOS process. Area is 0.92 mm x 0.78 mm and supply voltage is 5 V. Layout of class-E power amplifier is shown Southern Taiwan University 6

Experimental Results(2/2) Performance of reference volta ge vs output power and power efficiency The simulated curve of reference voltage ve rsus output power and power efficiency is shown. Maximum power efficiency is 71.5 % and maximum output power is 30.2 dBm at reference voltage 1.8 V Southern Taiwan University 7

Characteristics of load compensation The effect of load compensation on the power efficiency is shown Figure 6. Without the load compensation circuit, power efficiency would be degraded rapidly. When load compensation scheme is enable the power efficiency is insensitive to the load variation Southern Taiwan University 8

Conclusion Output power control range of dBm. The maximum power efficiency of the power amplifier is 71.5 %. Southern Taiwan University 9

References [1] Daniel Sira, Pia Thomsen, Torben Larsen “O utput Power Control in Class-E Power Amplifiers” IEEE Microwave and Wireless Components Letters, vol. 20, no. 4, pp , April 2010 [2] Jose Ignacio Garate, Jose Miguel de Diego, Sa lvadora Piedra Perea,“Mixed RF Output Power Control for Low Power Transmitters in Mobile Cellular Terminals" Proc. of IEEE International Symposium on Industrial Electronics, Montreal, Quebec, Canada, pp. 9-12, July Southern Taiwan University 10

謝謝聆聽 11