Analysis of the integration of envelope tracking with Continuous Class F amplifiers

Author

Merrick, B. ; Brazil, Thomas J.

Author_Institution

RF & Microwave Res. Group, Univ. Coll. Dublin, Dublin, Ireland

fYear

2012

fDate

3-4 Sept. 2012

Firstpage

1

Lastpage

3

Abstract

This paper analyses the suitability of Continuous Class F power amplifiers (PA) for use with envelope tracking (ET) systems. The effect on PA performance of reducing the drain bias is examined. The ET detroughing function is optimised in order to maximise the system linearity. When excited with 5 MHz WCDMA and 20 MHz LTE signals, the ET amplifier was found to improve PAE and ACPR by 18% and 11 dB, respectively, for the WCDMA case, and by 21% and 5 dB respectively, for the LTE case, when compared with a Continuous Class F amplifier without envelope tracking.

Keywords

UHF power amplifiers; wideband amplifiers; ACPR; ET amplifier; ET detroughing function; LTE signals; PAE; WCDMA signals; continuous class F power amplifiers; drain bias reduction; envelope tracking integration; frequency 20 MHz; frequency 5 MHz; Bandwidth; Gain; Linearity; Multiaccess communication; Performance evaluation; Radio frequency; Spread spectrum communication; Class F; Power Amplifier; broadband; envelope tracking; high efficiency;

fLanguage

English

Publisher

ieee

Conference_Titel

Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMIC), 2012 Workshop on

Conference_Location

Dublin

Print_ISBN

978-1-4673-2950-7

Electronic_ISBN

978-1-4673-2948-4

Type

conf

DOI

10.1109/INMMIC.2012.6331926

Filename

6331926