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Linearization of dual-input Doherty power amplifiers

Jessica Chani Cahuana (GigaHertz Centrum) ; Per N. Landin (GigaHertz Centrum) ; David Gustafsson (GigaHertz Centrum) ; Christian Fager (GigaHertz Centrum) ; Thomas Eriksson (GigaHertz Centrum)
International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits, INMMiC 2014 p. Art. no. 6815085. (2014)
[Konferensbidrag, refereegranskat]

This paper studies the linearity of dual-input Doherty power amplifiers. We propose a linearization scheme that uses a combination of an efficiency-optimized static splitter and a vector-switched digital predistorter. The performance of the proposed linearization scheme is evaluated on a dual-input Doherty power amplifier operating at 2.0 GHz with 42 dBm peak output power. Experimental results show that the proposed linearization scheme achieves a normalized mean square error of-43.7 dB and an adjacent channel power ratio of-55.8 dBc with a power added efficiency of 42.4%.

Nyckelord: digital Doherty , digital predistortion , dual-input Doherty , linearization , power amplifiers



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Denna post skapades 2014-07-01. Senast ändrad 2017-01-17.
CPL Pubid: 199954

 

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