Highly efficient GaN Doherty power amplifier for N78 sub-6 GHz band 5G applications

Al Gburi, Ahmed Jamal Abdullah and Alghamdi, Thamer A. H. and Eid, Mohammed A. Elsayed and Abouelnaga, Tamer G. and Ibrahim, Hamed A. and Hamad, Ehab K. I. and Alathbah, Moath (2023) Highly efficient GaN Doherty power amplifier for N78 sub-6 GHz band 5G applications. Electronics (Switzerland), 12 (19). pp. 1-22. ISSN 2079-9292

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Abstract

In this paper, a high-efficiency GaN Doherty power amplifier (DPA) for 5G applications in the N78 sub-6 GHz band is introduced. The theoretical analysis of the matching networks for the peak and carrier transistors is presented, with a focus on the impact of unequal power splitting for both transistors and the recommendation of a post-harmonic suppression network. The proposed design features an unequal Wilkinson power divider at the input and a post-harmonic suppression network at the output, both of which are crucial for achieving high efficiency. The Doherty power amplifier comprises two GaN 10 W HEMTs, measured across the 3.3 GHz to 3.8 GHz band (the N78 band), and the results reveal significant improvements in gain, output power, drain efficiency, and power-added efficiency. Specifically, the proposed design achieved a power gain of over 12 dB and 42 dBm saturated output power. It also achieved a drain efficiency of 80% at saturation and a power-added efficiency of 75.2%. Furthermore, the proposed harmonic suppression network effectively attenuated the harmonics at the output of the amplifier from the second to the fourth order to more than −50 dB, thus enhancing the device’s linearity.

Item Type:	Article
Uncontrolled Keywords:	Doherty power amplifier (DPA), GaN HEMT sub-6 GHz for 5G, Power divider/combiner, High efficiency, Power combiners, Harmonic suppression, Unequal Wilkinson power divider
Divisions:	Faculty Of Electronics And Computer Technology And Engineering
Depositing User:	Norfaradilla Idayu Ab. Ghafar
Date Deposited:	14 Mar 2025 16:31
Last Modified:	14 Mar 2025 16:31
URI:	http://eprints.utem.edu.my/id/eprint/28535
Statistic Details:	View Download Statistic

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