volume | PIER Journals

2022-08-01

Efficient Broadband Power Amplifier Using Klopfenstein Taper as Output Matching Network

Duo-Wei Liu,

Dr. Duo-Wei Liu

College of Electronics and Information Engineering

Sichuan University

China

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Fei Cheng,

Dr. Fei Cheng

College of Electronics and Information Engineering

Sichuan University

China

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Chao Gu,

Dr. Chao Gu

ECIT Institute

Queens University Belfast

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Ka-Ma Huang

Professor Ka-Ma Huang

Sichuan University

China

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Progress In Electromagnetics Research Letters, Vol. 105, 103-109, 2022

doi:10.2528/PIERL22030201

Abstract

An efficient 0.6-4.2 GHz GaN-HEMT power amplifier based on Klopfenstein taper is proposed in this letter. A method based on source-pull/load-pull simulation has been used to find the optimum source and load impedances across the broad band. Then the Klopfenstein taper is studied and adopted for the output matching circuit design to achieve broadband performance. The measured results show that our proposed power amplifier has a fractional bandwidth of 150%, with saturated output power ranging from 39.45 to 42.32 dBm, power added efﬁciency from 45.1% to 64.8%, and over 9 dB gain at the whole working band of 0.6-4.2 GHz. The fabricated power amplifier can cover most of the wireless communication frequency bands.

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Duo-Wei Liu, Fei Cheng, Chao Gu, and Ka-Ma Huang, "Efficient Broadband Power Amplifier Using Klopfenstein Taper as Output Matching Network," Progress In Electromagnetics Research Letters, Vol. 105, 103-109, 2022.
doi:10.2528/PIERL22030201

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