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High-efficiency broadband power amplifier with split-ring resonator second harmonic output matching network

Published online by Cambridge University Press:  31 May 2023

Yu Song Open the ORCID record for Yu Song [Opens in a new window] ,
Guohua Liu  and
Zhiqun Cheng
Yu Song
Affiliation:
School of Electronic and Information Engineering, Hangzhou Dianzi University, Hangzhou, China
Guohua Liu*
Affiliation:
School of Electronic and Information Engineering, Hangzhou Dianzi University, Hangzhou, China
Zhiqun Cheng
Affiliation:
School of Electronic and Information Engineering, Hangzhou Dianzi University, Hangzhou, China
*
Corresponding author: Guohua Liu, Email: ghliu@hdu.edu.cn
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Abstract

In this paper, a realization method for high-efficiency broadband power amplifier (PA) based on split-ring resonator (SRR) second harmonic output matching network (SHOMN) is presented. The SRR is composed of double rectangular rings, and it can flexibly match the second harmonic components to the high-efficiency impedance region in the Smith chart in a wide frequency band. Besides, the impedance transformation characteristic of SRR is derived, and the optimal output impedance is converted from the transistor drain to the output of SHOMN for accurate fundamental matching. For validation, a PA operating in 1.2–3.0 GHz is designed and fabricated for a 10-W GaN transistor. The measurement results show that the maximum efficiency can reach 78.3%; meanwhile, the average saturated output power is 41.0 dBm.

Keywords

power amplifierhigh-efficiencysplit-ring resonator
Type
Power Amplifiers
Information
International Journal of Microwave and Wireless Technologies , Volume 15 , Issue 7 , September 2023 , pp. 1091 - 1098
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Copyright
© The Author(s), 2023. Published by Cambridge University Press in association with the European Microwave Association

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