Title :
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
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;
Conference_Titel :
Microwave Symposium Digest, 2009. MTT '09. IEEE MTT-S International
Conference_Location :
Boston, MA
Print_ISBN :
978-1-4244-2803-8
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2009.5165937
