Comparison of S-Band Analog and Dual-Input Digital Doherty Power Amplifiers

Research output: Chapters, Conference Papers, Creative and Literary Works (RGC: 12, 32, 41, 45)32_Refereed conference paper (with ISBN/ISSN)

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Author(s)

  • Anna Piacibello
  • Marco Pirola
  • Vittorio Camarchia
  • Chiara Ramella
  • Roberto Quaglia

Related Research Unit(s)

Detail(s)

Original languageEnglish
Title of host publication2018 48th European Microwave Conference (EuMC 2018)
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1237-1240
ISBN (Electronic)9782874870514
ISBN (Print)9781538652855
Publication statusPublished - Sep 2018

Publication series

NameEuropean Microwave Conference

Conference

Title48th European Microwave Conference, EuMC 2018 (as part of the European Microwave Week 2018)
PlaceSpain
CityMadrid
Period25 - 27 September 2018

Abstract

This work aims at assessing the performance improvement offered by a dual-input digitally driven Doherty power amplifier (DPA) with respect to the single-input topology. To this aim, an analog DPA is designed and characterized. The equivalent digital version, which only differs by the absence of the input power divider, is also realized and analyzed. This ensures a fair comparison of the two topologies. Power-dependent input signal splitting between the main and auxiliary branches as well as adaptive phase alignment are adopted in the digital version to compensate for the back-off efficiency degradation as well as other shortcomings typically shown by traditional analog DPAs. For the first time, the performance figures of merit of the equivalent analog and digital DPAs are compared one-to-one systematically. The comparison over the 3.1-3.7 GHz range shows a superior efficiency performance of the digital DPA over the analog one, both at saturation and in back-off. Furthermore, the dual-input control also ensures higher gain and saturated output power.

Research Area(s)

  • back-off, digital, Doherty, efficiency enhancement, power amplifier

Bibliographic Note

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Citation Format(s)

Comparison of S-Band Analog and Dual-Input Digital Doherty Power Amplifiers. / Piacibello, Anna; Pirola, Marco; Camarchia, Vittorio; Ramella, Chiara; Quaglia, Roberto; Zhou, Xinyu; Chan, Wing -Shing.

2018 48th European Microwave Conference (EuMC 2018). Institute of Electrical and Electronics Engineers Inc., 2018. p. 1237-1240 8541531 (European Microwave Conference).

Research output: Chapters, Conference Papers, Creative and Literary Works (RGC: 12, 32, 41, 45)32_Refereed conference paper (with ISBN/ISSN)