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http://dx.doi.org/10.5515/KJKIEES.2011.22.12.1060

Design of Current-Mode Class-D 900 MHz RF Power Amplifier Using Inverse Class-F Technology  

Kim, Young-Woong (Department of Electronic Engineering, Konkuk University)
Lim, Jong-Gyun (Department of Electronic Engineering, Konkuk University)
Kang, Won-Shil (Department of Electronic Engineering, Konkuk University)
Ku, Hyun-Chul (Department of Electronic Engineering, Konkuk University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.22, no.12, 2011 , pp. 1060-1068 More about this Journal
Abstract
In this paper, Current-Mode Class-D(CMCD) RF Power Amplifier(PA) is designed and implemented at 900 MHz. Conventional CMCD PA has output parallel resonator to reconstruct a fundamental frequency component of the output signal. However the resonator can be removed by connecting inverse class-F PAs because even-harmonic components can be removed by CMCD PA's push-pull structure. Using load-pull, inverse class-F PA with GaN transistors is designed, and CMCD PA with the inverse class-F PA is implemented. The CMCD PA has 64.5 % drain efficiency, 34.2 dBm output power. Comparing with the drain efficiency of a CMCD PA with parallel resonator, the CMCD with the inverse class-F technology has 13.6 % improved drain efficiency.
Keywords
Current-Mode Class-D(CMCD); Inverse Class-F; Switch Mode Power Amplifier;
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