Techniques for Adaptive Input-Power Distribution in Doherty Power Amplifier and Load Modulation of Its Driver-Stage Power Amplifier

Sakata, Shuichi; Komatsuzaki, Yuji

doi:10.1109/tmtt.2022.3222232

Cited by 1 publication

(2 citation statements)

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“…Moreover, non-isolated power divider can be used to dynamically distribute power into the carrier and peaking PAs, improving the efficiency between the two efficiency peaks. 16,17 Nick and Mortazawi 16 designed a 3.5 GHz DPA using adaptive power distribution technique. The designed DPA maintains a DE of more than 52% over a 9 dB output back-off (OBO) power range.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, enhanced efficiency was obtained by carefully designing the offset line in Quaglia et al 14 and Kim et al 15 In Kim et al, 15 a 1.94 GHz DPA with a drain efficiency (DE) of more than 55% over a 6 dB dynamic power range was realized. Moreover, non‐isolated power divider can be used to dynamically distribute power into the carrier and peaking PAs, improving the efficiency between the two efficiency peaks 16,17 . Nick and Mortazawi 16 designed a 3.5 GHz DPA using adaptive power distribution technique.…”

Section: Introductionmentioning

confidence: 99%

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Analysis and design of dual‐input Doherty power amplifier with enhanced efficiency for broadband application

Liu

Shi

Feng

et al. 2023

Circuit Theory & Apps

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SummaryThere is a large efficiency degradation between the two efficiency peaks in a broadband Doherty power amplifier (DPA) when the working frequency deviates from the center point. In this paper, dual‐input technique is adopted to improve the conversion efficiency over the dynamic power range in broadband DPAs. The efficiency between the two efficiency peaks in the DPA is enhanced through dynamically control the input power levels of the carrier and peaking power amplifiers (PAs) as well as the phase difference between the two sub‐amplifiers. As a proof of concept, a broadband dual‐input DPA (DI‐DPA) operating over 1.1–2.2 GHz is fabricated and measured in this paper. Experimental results show the fabricated DI‐DPA delivers a saturation output power of 43.5–44.7 dBm with a gain of 9.6–11.5 dB and a drain efficiency of 50.5%–58.6% in the interested frequency band. Meanwhile, a 6 dB back‐off drain efficiency of 40.4%–65.8% is also obtained by the DI‐DPA over 1.1–2.2 GHz.

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Section: Introductionmentioning

confidence: 99%