A linear 250 watt Doherty power amplifier based on two-stage power ICs for 1.8 GHz single and multi-carrier GSM applications

Author

Bokatius, Mario ; Bigny, Guillaume ; Hart, Paul ; Wood, John

Author_Institution

RF Div., Freescale Semicond., Inc., Tempe, AZ, USA

fYear

2009

fDate

7-12 June 2009

Firstpage

1277

Lastpage

1280

Abstract

In this paper we describe the design and measured performance of a Doherty power amplifier constructed using two-stage power amplifier IC building blocks. The Doherty PA was designed for single- and multi-carrier GSM applications in the 1800 MHz band. The 3-dB compression point of the amplifier is 54 dBm, and the PA displays excellent raw linearity for use in single-carrier GSM applications. Using a commercial digital predistortion system, the amplifier provides power output of 47 dBm at -70 dBc correction with a two-carrier GSM signal, and 45.5 dBm at -60 dBc correction with a four-carrier GSM signal.

Keywords

UHF integrated circuits; UHF power amplifiers; cellular radio; power integrated circuits; Doherty power amplifier; digital predistortion system; frequency 1.8 GHz; multicarrier GSM application; power 250 W; raw linearity; single-carrier GSM application; two-stage power amplifier IC building blocks; Application specific integrated circuits; GSM; Linearity; Power amplifiers; Power integrated circuits; Predistortion; Radio frequency; Radiofrequency amplifiers; Radiofrequency integrated circuits; Semiconductor optical amplifiers; Doherty; GSM; MC-GSM; Power amplifiers; digital predistortion; error correction;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2009. MTT '09. IEEE MTT-S International

Conference_Location

Boston, MA

ISSN

0149-645X

Print_ISBN

978-1-4244-2803-8

Electronic_ISBN

0149-645X

Type

conf

DOI

10.1109/MWSYM.2009.5165937

Filename

5165937