High-Efficiency Broadband GaN Power Amplifier with Algorithmic Gate-Bias Optimization.
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| Title: | High-Efficiency Broadband GaN Power Amplifier with Algorithmic Gate-Bias Optimization. |
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| Authors: | Elrefaey, Ahmed1, Faragb, Fathi A.2, Hamdi, Azhar A.2, Almslmany, Amir1 dr.mslmany.7256.adc@alexu.edu.eg |
| Source: | Progress in Electromagnetics Research C. 2026, Vol. 165, p108-117. 10p. |
| Subjects: | Power amplifiers, Mathematical optimization, Wireless communications, Broadband communication systems |
| Abstract: | Achieving simultaneous wideband operation and high output power efficiency remains a major challenge in modern GaN HEMT power amplifier (PA) design, particularly for broadband communications and radar systems. This paper presents a systematic design methodology for a broadband PA that integrates radial-stub (RS)-based bias/matching networks with an algorithmic gate-bias (VGS) optimization, alongside load-pull-derived device termination and compact layout. Starting with the Wolfspeed CMPA0530002S GaN HEMT, which features intrinsic broadband stability and an integrated input match, we replace conventional narrowband bias lines with a radial-stub network that ensures broadband bias isolation and low-loss matching. A thorough load-pull study identifies the optimum load impedance for concurrent maximization of power-added efficiency (PAE), gain, and output power. Subsequently, an automated VGS sweep across the full 1.16-1.6 GHz band determines the optimal bias point for broadband and efficiency trade-off. The PA achieves a simulated result of output power of 34.28 dBm, flat gain of approximately 13.28 dB, and a peak PAE of 58.69% in a fractional bandwidth of 37% (1.16-1.6 GHz). A key novelty of this work lies in the proposed algorithmic VGS sweep technique, which enables optimization of broadband efficiency throughout the entire 1.16-1.6 GHz operating band and can be easily extended to other frequency ranges. Unlike conventional bias optimization methods that are limited to a single frequency, the proposed algorithm systematically identifies the optimal gate bias across multiple frequencies to maintain high efficiency and consistent output power over a wide bandwidth. The simulated results confirm that this algorithmic bias optimization approach achieves superior broadband efficiency and stable output performance, providing a scalable and adaptable design methodology for next-generation wireless communication and electronic warfare systems. [ABSTRACT FROM AUTHOR] |
| Copyright of Progress in Electromagnetics Research C is the property of Electromagnetics Academy 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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| Items | – Name: Title Label: Title Group: Ti Data: High-Efficiency Broadband GaN Power Amplifier with Algorithmic Gate-Bias Optimization. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Elrefaey%2C+Ahmed%22">Elrefaey, Ahmed</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Faragb%2C+Fathi+A%2E%22">Faragb, Fathi A.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Hamdi%2C+Azhar+A%2E%22">Hamdi, Azhar A.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Almslmany%2C+Amir%22">Almslmany, Amir</searchLink><relatesTo>1</relatesTo><i> dr.mslmany.7256.adc@alexu.edu.eg</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Progress+in+Electromagnetics+Research+C%22">Progress in Electromagnetics Research C</searchLink>. 2026, Vol. 165, p108-117. 10p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Power+amplifiers%22">Power amplifiers</searchLink><br /><searchLink fieldCode="DE" term="%22Mathematical+optimization%22">Mathematical optimization</searchLink><br /><searchLink fieldCode="DE" term="%22Wireless+communications%22">Wireless communications</searchLink><br /><searchLink fieldCode="DE" term="%22Broadband+communication+systems%22">Broadband communication systems</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Achieving simultaneous wideband operation and high output power efficiency remains a major challenge in modern GaN HEMT power amplifier (PA) design, particularly for broadband communications and radar systems. This paper presents a systematic design methodology for a broadband PA that integrates radial-stub (RS)-based bias/matching networks with an algorithmic gate-bias (VGS) optimization, alongside load-pull-derived device termination and compact layout. Starting with the Wolfspeed CMPA0530002S GaN HEMT, which features intrinsic broadband stability and an integrated input match, we replace conventional narrowband bias lines with a radial-stub network that ensures broadband bias isolation and low-loss matching. A thorough load-pull study identifies the optimum load impedance for concurrent maximization of power-added efficiency (PAE), gain, and output power. Subsequently, an automated VGS sweep across the full 1.16-1.6 GHz band determines the optimal bias point for broadband and efficiency trade-off. The PA achieves a simulated result of output power of 34.28 dBm, flat gain of approximately 13.28 dB, and a peak PAE of 58.69% in a fractional bandwidth of 37% (1.16-1.6 GHz). A key novelty of this work lies in the proposed algorithmic VGS sweep technique, which enables optimization of broadband efficiency throughout the entire 1.16-1.6 GHz operating band and can be easily extended to other frequency ranges. Unlike conventional bias optimization methods that are limited to a single frequency, the proposed algorithm systematically identifies the optimal gate bias across multiple frequencies to maintain high efficiency and consistent output power over a wide bandwidth. The simulated results confirm that this algorithmic bias optimization approach achieves superior broadband efficiency and stable output performance, providing a scalable and adaptable design methodology for next-generation wireless communication and electronic warfare systems. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Progress in Electromagnetics Research C is the property of Electromagnetics Academy 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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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.2528/PIERC25111801 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 10 StartPage: 108 Subjects: – SubjectFull: Power amplifiers Type: general – SubjectFull: Mathematical optimization Type: general – SubjectFull: Wireless communications Type: general – SubjectFull: Broadband communication systems Type: general Titles: – TitleFull: High-Efficiency Broadband GaN Power Amplifier with Algorithmic Gate-Bias Optimization. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Elrefaey, Ahmed – PersonEntity: Name: NameFull: Faragb, Fathi A. – PersonEntity: Name: NameFull: Hamdi, Azhar A. – PersonEntity: Name: NameFull: Almslmany, Amir IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 03 Text: 2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 19378718 Numbering: – Type: volume Value: 165 Titles: – TitleFull: Progress in Electromagnetics Research C Type: main |
| ResultId | 1 |
