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 in:IEEE transactions on industrial electronics (1982) 2021-06, Vol.68 (6), p.5000-5012
Main Authors: Liu, Chang, Li, Xiang, Zhao, Yulong, Qi, Tian, Du, Xuekun, Chen, Wenhua, Ghannouchi, Fadhel M.
Format: Article
Language:English
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