A broadband high-efficiency GaN-based power amplifier using an improved continuous mode

Haipeng Zhu, Zhiwei Zhang*, Chao Gu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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This paper proposes a broadband high-efficiency power amplifier using an improved continuous mode design. A tuning parameter is introduced into the current expression of the drain to purposely introduce more sine components. These sine components extend the impedance space of the traditional continuous mode, provide greater flexibility in the design of the broadband output matching network, thereby widening the operating bandwidth. Moreover, since no overlap between the current sine components and the voltage cosine components are produced, these sine components do not degrade the PA’s efficiency, unlike traditional continuous-mode PAs that often trade efficiency for bandwidth. To validate our approach, a broadband high-efficiency power amplifier is designed using GaN HEMT. Measurements indicate that output power is between 40.8 dBm and 42.3 dBm, and the drain efficiency varies from 72.7%–81.8% in 1.5–2.5 GHz, while the gain is between 11.3 dB and 13.0 dB in the same frequency range.

Original languageEnglish
Article number20230079
JournalIEICE Electronics Express
Issue number8
Early online date22 Mar 2023
Publication statusPublished - 25 Apr 2023

Bibliographical note

Funding Information:
This work was supported by the National Natural Science Foundation (Grant 62201181). We thank Ze Qin for the helpful discussions.

Publisher Copyright:
Copyright © 2023 The Institute of Electronics, Information and Communication Engineers.


  • broadband
  • GaN
  • high efficiency
  • improved continuous mode
  • power amplifier

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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