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Single-Input Broadband Hybrid Doherty Power Amplifiers Design Relying on a Phase Sliding-Mode of the Load Modulation Scheme

https://doi.org/10.1109/TMTT.2022.3222355

Liang, Chenyu; Roblin, Patrick; Hahn, Yunsik; Martinez-Lopez, Jose I.; Chang, Hsiu-Chen; Chen, Vanessa (November 2022, IEEE Transactions on Microwave Theory and Techniques)

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Analysis and Digital Predistortion of in-Band Cross Modulation in Concurrent Multi-Band Transmitters

https://doi.org/10.1109/ACCESS.2022.3222367

Hahn, Yunsik; Martinez-Lopez, Jose I.; Roblin, Patrick; Alsulami, Ruwaybih; Popovic, Zoya; Chen, Vanessa (January 2022, IEEE Access)

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A Novel 3-Way Dual-Band Doherty Power Amplifier for Enhanced Concurrent Operation

https://doi.org/10.1109/TMTT.2021.3091507

Alsulami, Ruwaybih; Roblin, Patrick; Martinez-Lopez, Jose I.; Hahn, Yunsik; Liang, Chenyu; Popovic, Zoya; Chen, Vanessa (August 2021, IEEE Transactions on Microwave Theory and Techniques)
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Wideband Two-Way Hybrid Doherty Outphasing Power Amplifier

https://doi.org/10.1109/TMTT.2020.3019430

Liang, Chenyu; Martinez-Lopez, Jose I.; Roblin, Patrick; Hahn, Yunsik; Mikrut, Dominic; Chen, Vanessa (September 2020, IEEE Transactions on Microwave Theory and Techniques)

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Generalized Class-J Theory

https://doi.org/10.1109/LAMC.2018.8699065

Roblin, Patrick; Chang, Hsiu-Chen; Gomez-Perez, Jose-Maria; Martinez-Lopez, Jose I. (December 2018, 2018 IEEE MTT-S Latin America Microwave Conference (LAMC 2018))

Class J has introduced a new rigorous framework for designing broadband PAs. However, the design of broadband Class-J amplifiers remains challenging, as the fundamental impedance termination is non-Foster when the 2 nd harmonic is Foster. In addition the peak instantaneous voltage varies by up to 50% as the frequency changes. In this paper, a generalized Class-J theory is introduced. Then a DC tunable broadband PA with constant instantaneous peak voltage and Foster fundamental and harmonic terminations is proposed.
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