Title :
Analysis and design of series combining transformers for integrated Doherty power amplifiers
Author :
Kaymaksüt, Ercan ; François, Brecht ; Reynaert, Patrick
Author_Institution :
ESAT-MICAS, Katholieke Univ. Leuven, Leuven, Belgium
Abstract :
In this paper, analysis and design of a series combining transformer based integrated Doherty PA is presented. A Z-parameter based model is used to optimize the series combining transformer(SCT) for Doherty operation. The proposed 2.4 GHz fully integrated Doherty Power Amplifier is fabricated in standard 90 nm CMOS technology and aimed for high linearity WLAN applications. The measurement results indicate that the PA shows efficiency enhancement at power back-off due to Doherty operation. The PA delivers 20.5 dBm output power with a peak drain efficiency of 30.9% (PAE 26.7%) by using 2 V supply voltage. The two stage Doherty PA has 16.6 dB small signal gain and 1 dB compression occurs at 17.5 dBm output power.
Keywords :
CMOS integrated circuits; power amplifiers; transformers; wireless LAN; CMOS technology; WLAN application; Z-parameter based model; frequency 2.4 GHz; integrated Doherty power amplifier; series combining transformer; size 90 nm; voltage 2 V; Capacitors; Circuit faults; Impedance; Inductors; Power amplifiers; Power generation; Windings; Doherty; Power Amplifier; Series Combining; Transformer;
Conference_Titel :
Microwave Conference Proceedings (APMC), 2010 Asia-Pacific
Conference_Location :
Yokohama
Print_ISBN :
978-1-4244-7590-2
Electronic_ISBN :
978-1-902339-22-2
