Investigation of High-Efficiency Parallel-Circuit Class-EF Power Amplifiers With Arbitrary Duty Cycles

In this article, a parallel-circuit class-EF power amplifier with a shunt quarter-wave transmission-line for driving signals with arbitrary duty cycles is proposed and investigated. At the particular condition of duty cycle = 1/3, the values of the elements in the output network, as well as, some cr...

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Bibliographic Details
Published inIEEE transactions on industrial electronics (1982) Vol. 68; no. 6; pp. 5000 - 5012
Main Authors Liu, Chang, Li, Xiang, Zhao, Yulong, Qi, Tian, Du, Xuekun, Chen, Wenhua, Ghannouchi, Fadhel M.
Format Journal Article
LanguageEnglish
Published New York IEEE 01.06.2021
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
5G mobile communication
Capacitance
Circuit design
Class-EF
Design optimization
Design parameters
duty cycles
high-efficiency
Inductance
parallel circuit
Power amplifiers
quarter-wave transmission line
Switches
Transistors
Transmission lines
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Summary:In this article, a parallel-circuit class-EF power amplifier with a shunt quarter-wave transmission-line for driving signals with arbitrary duty cycles is proposed and investigated. At the particular condition of duty cycle = 1/3, the values of the elements in the output network, as well as, some critical design parameters are analyzed and optimized. This leads to a series of significant improvements in the peak drain voltage ( V max ), the maximum operating frequency ( f max ), and the power output capability ( c p ). Furthermore, in order to verify the advantage of the proposed new amplifier and its feasibility in realistic situations, a proof-of-concept circuit is designed and fabricated. Finally, at the operating frequency of 3.59 GHz, excellent performance has been achieved with the power-added efficiency of 79.9% and output power of 40.7 dBm.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2020.2991924