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Linearity and efficiency improvement using envelope tracking power amplifier

: Auer, Felix; Schiller, Stefan; Kamper, Michael


Institute of Electrical and Electronics Engineers -IEEE-:
10th German Microwave Conference, GeMIC 2016. Proceedings : 14-16 March 2016, Bochum, Germany
Piscataway, NJ: IEEE, 2016
ISBN: 978-1-4673-9887-9
ISBN: 978-3-9812668-7-0
German Microwave Conference (GeMiC) <10, 2016, Bochum>
Conference Paper
Fraunhofer IIS ()
Verstärker; Leistungsverstärker; Hochfrequenztechnik

This paper presents linearity improvement of power amplifiers (PAs) with envelope tracking (ET) modulators. ET modulators vary the supply voltage of RF power amplifiers to optimize the efficiency, but potentially degrade the linearity of the system. However, ET has shown to improve both efficiency and linearity under certain conditions. This work presents an analytical study of the PA linearity with supply voltage modulation. The theoretical considerations are supported by performance measurements using an ET hardware implementation.