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Symmetrical Doherty Power Amplifier With Extended Efficiency Range

Mustafa Özen (Institutionen för mikroteknologi och nanovetenskap, Mikrovågselektronik) ; K. Andersson ; Christian Fager (Institutionen för mikroteknologi och nanovetenskap, Mikrovågselektronik)
IEEE Transactions on Microwave Theory and Techniques (0018-9480). Vol. 64 (2016), 4, p. 1273-1284.
[Artikel, refereegranskad vetenskaplig]

A symmetrical Doherty power amplifier (PA) with an extended efficiency range is proposed. This paper proves the existence of a class of symmetrical Doherty PAs having efficiency peaks for back-off levels larger than 6 dB. A design technique is developed that maintains the full voltage and current swings of both the main and auxiliary transistors. The concept is experimentally verified in a 1.95-GHz 25-W circuit demonstrator fabricated using identical GaN HEMT devices. An average power-added efficiency of 50% and adjacent power leakage ratio of -49 dBc is obtained with 9-dB peak-to-average power-ratio 20-MHz long-term evolution test signals.

Nyckelord: Combiner synthesis, Doherty power amplifier (PA), efficiency



Denna post skapades 2016-05-27. Senast ändrad 2016-06-03.
CPL Pubid: 237038

 

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Institutioner (Chalmers)

Institutionen för mikroteknologi och nanovetenskap, Mikrovågselektronik

Ämnesområden

Elektroteknik och elektronik

Chalmers infrastruktur