Unveiling the Bias Mosaic: Enhancing Doherty Power Amplifiers With Bias Network Variation and Layout Optimization

Yanze Wang; Jingyun Bi; Ye Yuan; Xinyu Zhou; Wing Shing Chan

doi:10.1109/MMM.2025.3550094

Unveiling the Bias Mosaic: Enhancing Doherty Power Amplifiers With Bias Network Variation and Layout Optimization

Yanze Wang (Co-first Author)
, Jingyun Bi (Co-first Author)
, Ye Yuan
, Xinyu Zhou
, Wing Shing Chan

Department of Electrical Engineering

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

1 Citation (Scopus)

Abstract

This paper presents an enhanced Doherty power amplifier (DPA) design tailored for the 2024 IEEE High Efficiency Power Amplifier Student Design Competition (HEPA SDC). An innovative approach based on adjusting bias network electrical parameters is proposed, optimizing microstrip line electrical length and characteristic impedance to effectively improve the linearity, efficiency, and gain of the amplifier, as preliminarily verified by simulations. Furthermore, a simulated annealing algorithm is applied for electromagnetic co-simulation and layout refinement, enabling an optimized trade-off among power-added efficiency (PAE), third-order intermodulation distortion (IMD3) suppression, and output power at 3.5 GHz. Simulation and measurement results confirm that the proposed DPA meets the competition's requirements, achieving acceptable overall performance and a competitive result in the competition.

© 2025 IEEE. All rights reserved, including rights for text and data mining, and training of artificial intelligence and similar technologies.

Original language	English
Pages (from-to)	127-138
Journal	IEEE Microwave Magazine
Volume	26
Issue number	6
Online published	9 May 2025
DOIs	https://doi.org/10.1109/MMM.2025.3550094
Publication status	Published - Jun 2025

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title = "Unveiling the Bias Mosaic: Enhancing Doherty Power Amplifiers With Bias Network Variation and Layout Optimization",

abstract = "This paper presents an enhanced Doherty power amplifier (DPA) design tailored for the 2024 IEEE High Efficiency Power Amplifier Student Design Competition (HEPA SDC). An innovative approach based on adjusting bias network electrical parameters is proposed, optimizing microstrip line electrical length and characteristic impedance to effectively improve the linearity, efficiency, and gain of the amplifier, as preliminarily verified by simulations. Furthermore, a simulated annealing algorithm is applied for electromagnetic co-simulation and layout refinement, enabling an optimized trade-off among power-added efficiency (PAE), third-order intermodulation distortion (IMD3) suppression, and output power at 3.5 GHz. Simulation and measurement results confirm that the proposed DPA meets the competition's requirements, achieving acceptable overall performance and a competitive result in the competition. {\textcopyright} 2025 IEEE. All rights reserved, including rights for text and data mining, and training of artificial intelligence and similar technologies.",

author = "Yanze Wang and Jingyun Bi and Ye Yuan and Xinyu Zhou and Chan, \{Wing Shing\}",

year = "2025",

month = jun,

doi = "10.1109/MMM.2025.3550094",

language = "English",

volume = "26",

pages = "127--138",

journal = "IEEE Microwave Magazine",

issn = "1527-3342",

publisher = "IEEE",

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Unveiling the Bias Mosaic: Enhancing Doherty Power Amplifiers With Bias Network Variation and Layout Optimization. / Wang, Yanze (Co-first Author); Bi, Jingyun (Co-first Author); Yuan, Ye et al.
In: IEEE Microwave Magazine, Vol. 26, No. 6, 06.2025, p. 127-138.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

TY - JOUR

T1 - Unveiling the Bias Mosaic

T2 - Enhancing Doherty Power Amplifiers With Bias Network Variation and Layout Optimization

AU - Wang, Yanze

AU - Bi, Jingyun

AU - Yuan, Ye

AU - Zhou, Xinyu

AU - Chan, Wing Shing

PY - 2025/6

Y1 - 2025/6

N2 - This paper presents an enhanced Doherty power amplifier (DPA) design tailored for the 2024 IEEE High Efficiency Power Amplifier Student Design Competition (HEPA SDC). An innovative approach based on adjusting bias network electrical parameters is proposed, optimizing microstrip line electrical length and characteristic impedance to effectively improve the linearity, efficiency, and gain of the amplifier, as preliminarily verified by simulations. Furthermore, a simulated annealing algorithm is applied for electromagnetic co-simulation and layout refinement, enabling an optimized trade-off among power-added efficiency (PAE), third-order intermodulation distortion (IMD3) suppression, and output power at 3.5 GHz. Simulation and measurement results confirm that the proposed DPA meets the competition's requirements, achieving acceptable overall performance and a competitive result in the competition. © 2025 IEEE. All rights reserved, including rights for text and data mining, and training of artificial intelligence and similar technologies.

AB - This paper presents an enhanced Doherty power amplifier (DPA) design tailored for the 2024 IEEE High Efficiency Power Amplifier Student Design Competition (HEPA SDC). An innovative approach based on adjusting bias network electrical parameters is proposed, optimizing microstrip line electrical length and characteristic impedance to effectively improve the linearity, efficiency, and gain of the amplifier, as preliminarily verified by simulations. Furthermore, a simulated annealing algorithm is applied for electromagnetic co-simulation and layout refinement, enabling an optimized trade-off among power-added efficiency (PAE), third-order intermodulation distortion (IMD3) suppression, and output power at 3.5 GHz. Simulation and measurement results confirm that the proposed DPA meets the competition's requirements, achieving acceptable overall performance and a competitive result in the competition. © 2025 IEEE. All rights reserved, including rights for text and data mining, and training of artificial intelligence and similar technologies.

UR - https://www.scopus.com/pages/publications/105004765691

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-105004765691&origin=recordpage

U2 - 10.1109/MMM.2025.3550094

DO - 10.1109/MMM.2025.3550094

M3 - RGC 21 - Publication in refereed journal

SN - 1527-3342

VL - 26

SP - 127

EP - 138

JO - IEEE Microwave Magazine

JF - IEEE Microwave Magazine

IS - 6

ER -

Unveiling the Bias Mosaic: Enhancing Doherty Power Amplifiers With Bias Network Variation and Layout Optimization

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