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

Anna Piacibello; Marco Pirola; Vittorio Camarchia; Chira Ramella; Roberto Quaglia; Xinyu Zhou; Wing-Shing Chan

doi:10.23919/EuMIC.2018.8539954

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

Anna Piacibello^*
, Marco Pirola
, Vittorio Camarchia
, Chira Ramella
, Roberto Quaglia^*
, Xinyu Zhou^*
, Wing-Shing Chan

^*Corresponding author for this work

Department of Electrical Engineering

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

9 Citations (Scopus)

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.

Original language	English
Title of host publication	2018 13th European Microwave Integrated Circuits Conference (EuMIC 2018)
Publisher	IEEE
Pages	269-272
ISBN (Electronic)	9782874870521
ISBN (Print)	9781538652862
DOIs	https://doi.org/10.23919/EuMIC.2018.8539954
Publication status	Published - Sept 2018
Event	13th European Microwave Integrated Circuits Conference, EuMIC 2018 (as part of the European Microwave Week 2018) - Madrid, Spain Duration: 24 Sept 2018 → 25 Sept 2018 https://www.aconf.org/conf_157507.html

Publication series

Name	European Microwave Integrated Circuits Conference

Conference

Conference	13th European Microwave Integrated Circuits Conference, EuMIC 2018 (as part of the European Microwave Week 2018)
Abbreviated title	EuMIC 2018
Place	Spain
City	Madrid
Period	24/09/18 → 25/09/18
Internet address	https://www.aconf.org/conf_157507.html

Bibliographical note

Full text of this publication does not contain sufficient affiliation information. With consent from the author(s) concerned, the Research Unit(s) information for this record is based on the existing academic department affiliation of the author(s).

Research Keywords

back-off
digital
Doherty
efficiency enhancement
power amplifier

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10.23919/EuMIC.2018.8539954

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Piacibello, A., Pirola, M., Camarchia, V., Ramella, C., Quaglia, R., Zhou, X., & Chan, W.-S. (2018). Comparison of S-band Analog and Dual-Input Digital Doherty Power Amplifiers. In 2018 13th European Microwave Integrated Circuits Conference (EuMIC 2018) (pp. 269-272). Article 8539954 (European Microwave Integrated Circuits Conference). IEEE. https://doi.org/10.23919/EuMIC.2018.8539954

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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.",

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note = "Full text of this publication does not contain sufficient affiliation information. With consent from the author(s) concerned, the Research Unit(s) information for this record is based on the existing academic department affiliation of the author(s).; 13th European Microwave Integrated Circuits Conference, EuMIC 2018 (as part of the European Microwave Week 2018), EuMIC 2018 ; Conference date: 24-09-2018 Through 25-09-2018",

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Piacibello, A, Pirola, M, Camarchia, V, Ramella, C, Quaglia, R, Zhou, X & Chan, W-S 2018, Comparison of S-band Analog and Dual-Input Digital Doherty Power Amplifiers. in 2018 13th European Microwave Integrated Circuits Conference (EuMIC 2018)., 8539954, European Microwave Integrated Circuits Conference, IEEE, pp. 269-272, 13th European Microwave Integrated Circuits Conference, EuMIC 2018 (as part of the European Microwave Week 2018), Madrid, Spain, 24/09/18. https://doi.org/10.23919/EuMIC.2018.8539954

Comparison of S-band Analog and Dual-Input Digital Doherty Power Amplifiers. / Piacibello, Anna; Pirola, Marco; Camarchia, Vittorio et al.
2018 13th European Microwave Integrated Circuits Conference (EuMIC 2018). IEEE, 2018. p. 269-272 8539954 (European Microwave Integrated Circuits Conference).

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

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AU - Zhou, Xinyu

AU - Chan, Wing-Shing

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N2 - 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.

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M3 - RGC 32 - Refereed conference paper (with host publication)

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Y2 - 24 September 2018 through 25 September 2018

ER -

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

Abstract

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Conference

Bibliographical note

Research Keywords

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