Doherty Power Amplifier With Enhanced Efficiency at Extended Operating Average Power Levels

Mohamed, Ahmed Mohamed Mahmoud; Boumaiza, Slim; Mansour, Raafat R.

doi:10.1109/tmtt.2013.2288604

Cited by 15 publications

(1 citation statement)

References 27 publications

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“…To improve efficiency at large OBO power level, Doherty power amplifiers (DPA) has been widely used due to its high efficiency at the reduced power condition [2,3,4,5,6,7,8]. To meet the increasing demand on information capacity, the signal modulation formats are becoming more and more complicated.…”

Section: Introductionmentioning

confidence: 99%

Bandwidth enhancement of three-device Doherty power amplifier based on symmetric devices

Cheng

Zhang

et al. 2018

IEICE Electron. Express

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This paper proposes a method for extending the bandwidth of a three-device Doherty power amplifier (DPA) based on symmetric devices. λ/4 transmission lines are inserted between each peaking amplifier output and carrier amplifier output to compensate load impedance of carrier amplifier. In order to achieve perfect load modulation, carrier amplifier output circuit total electrical length is designed to 90 degrees, and the peak amplifier output total electrical length is designed to 180 degrees. The proposed method is demonstrated by designing a three-device broadband DPA using three 10-W packaged GaN HEMT devices. Measurement results show that over 40% drain efficiency is achieved at 9-dB back-off power, over the frequency band of 1.45-2.35 GHz, accounting for 46% fractional bandwidth.

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Section: Introductionmentioning

confidence: 99%