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Main Title: Design and analysis of 80-W wideband asymmetrical Doherty amplifier
Author(s): Bathich, Khaled
Böck, Georg
Type: Article
Language Code: en
Abstract: This paper presents the analysis and design of a wideband asymmetrical Doherty amplifier. The frequency response of the output combining network of the Doherty amplifier with arbitrary back-off level configuration is analyzed. Other bandwidth-limiting factors were discussed and analyzed as well. A number of performance enhancement techniques were taken into consideration to obtain high and flat back-off efficiency over the amplifier design band of 1.7–2.25 GHz. The designed Doherty amplifier had, at 8.0–9.9 dB output back-off, a minimum efficiency of η = 50% [power-added efficiency of 45%], measured near 40 dBm of output power, and over 28% bandwidth. Using digital predistortion (DPD) linearization, an adjacent-channel leakage ratio (ACLR) of −43 dBc was obtained for a single-carrier W-CDMA signal, at 40.9 dBm and 46% of average output power and drain efficiency, respectively. The designed amplifier represents the first wideband Doherty amplifier reported over extended power back-off range.
Issue Date: 2014
Date Available: 12-Feb-2018
DDC Class: 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
Subject(s): power amplifiers and linearizers
circuit design and applications
Journal Title: International journal of microwave and wireless technologies
Publisher: Cambridge University Press
Publisher Place: Cambridge
Volume: 7
Issue: 1
Publisher DOI: 10.1017/s1759078714000452
Page Start: 13
Page End: 18
EISSN: 1759-0795
ISSN: 1759-0787
Notes: Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
This publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence (funded by the DFG, German Research Foundation) respectively.
Appears in Collections:FG Mikrowellentechnik » Publications

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