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A Dual‐Frequency Wideband Inverse Class‐F Power Amplifier Using SRFT Matching.

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Title: A Dual‐Frequency Wideband Inverse Class‐F Power Amplifier Using SRFT Matching.
Authors: He, Haitao1 (AUTHOR), Zhao, Guijuan2 (AUTHOR), Liu, Yunqiang2 (AUTHOR) liuyunqiang@lut.edu.cn, Sun, Yifei1 (AUTHOR), Liu, Guipeng1 (AUTHOR) liugp@lzu.edu.cn, Xu, Jin (AUTHOR) xujin227@nwpu.edu.cn
Source: International Journal of RF & Microwave Computer-Aided Engineering. 6/2/2026, Vol. 2026, p1-7. 7p.
Subjects: Power amplifiers
Abstract: This paper introduces a dual‐frequency wideband inverse Class‐F power amplifier (PA). This PA employs a dual‐frequency biasing circuit to effectively prevent RF signals from entering the DC power supply. We combine the SRFT with the continuous inverse Class‐F PA reactance space to design a wideband matching network. By moderately relaxing the third harmonic constraints in the low‐frequency band to avoid spectrum conflicts, the proposed PA achieves high efficiency and wideband characteristics. After testing, the designed PA has a 57.4%–61.1% drain efficiency and 39.4–40.3 dBm output power in the 0.8–1.0 GHz range and a 58.5%–71.7% drain efficiency and 40.6–41.7 dBm output power in the 3.3–3.8 GHz range. [ABSTRACT FROM AUTHOR]
Copyright of International Journal of RF & Microwave Computer-Aided Engineering is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: A Dual‐Frequency Wideband Inverse Class‐F Power Amplifier Using SRFT Matching.
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  Data: <searchLink fieldCode="AR" term="%22He%2C+Haitao%22">He, Haitao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhao%2C+Guijuan%22">Zhao, Guijuan</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Yunqiang%22">Liu, Yunqiang</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> liuyunqiang@lut.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Sun%2C+Yifei%22">Sun, Yifei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Guipeng%22">Liu, Guipeng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> liugp@lzu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Xu%2C+Jin%22">Xu, Jin</searchLink> (AUTHOR)<i> xujin227@nwpu.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+RF+%26+Microwave+Computer-Aided+Engineering%22">International Journal of RF & Microwave Computer-Aided Engineering</searchLink>. 6/2/2026, Vol. 2026, p1-7. 7p.
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  Data: <searchLink fieldCode="DE" term="%22Power+amplifiers%22">Power amplifiers</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: This paper introduces a dual‐frequency wideband inverse Class‐F power amplifier (PA). This PA employs a dual‐frequency biasing circuit to effectively prevent RF signals from entering the DC power supply. We combine the SRFT with the continuous inverse Class‐F PA reactance space to design a wideband matching network. By moderately relaxing the third harmonic constraints in the low‐frequency band to avoid spectrum conflicts, the proposed PA achieves high efficiency and wideband characteristics. After testing, the designed PA has a 57.4%–61.1% drain efficiency and 39.4–40.3 dBm output power in the 0.8–1.0 GHz range and a 58.5%–71.7% drain efficiency and 40.6–41.7 dBm output power in the 3.3–3.8 GHz range. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of International Journal of RF & Microwave Computer-Aided Engineering is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1155/mmce/5682618
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      – Code: eng
        Text: English
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        PageCount: 7
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      – SubjectFull: Power amplifiers
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      – TitleFull: A Dual‐Frequency Wideband Inverse Class‐F Power Amplifier Using SRFT Matching.
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            NameFull: He, Haitao
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            NameFull: Zhao, Guijuan
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            – D: 02
              M: 06
              Text: 6/2/2026
              Type: published
              Y: 2026
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              Value: 2026
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