Title :
Design methodology and integration of a 1.8GHz outphasing power amplifier for mobile terminals
Author :
Talebi Amiri, Omid ; Koukab, Adil
Author_Institution :
Ecole Polytech. Fed. de Lausanne (EPFL), Lausanne, Switzerland
Abstract :
This paper resolves the acute problems of integration and losses in the outphasing transmitters using a non-isolated power combiner, based on λ/4 transmission lines (TLs). A design methodology that enables to minimize the losses in the power combiner and to improve its quality factor is developed. A fully integrated outphasing transmitter using a modified class D power amplifier (PA) is designed with its combiner and fabricated in 90nm CMOS technology. The proposed PA improves the efficiency and avoids the reliability issues in CMOS technology. The measured maximum output power and efficiency are 22.7 dBm and 34.1 % at 1.8 GHz.
Keywords :
CMOS analogue integrated circuits; Q-factor; mobile radio; power amplifiers; power combiners; transmission lines; λ/4 transmission lines; CMOS technology; class D power amplifier; frequency 1.8 GHz; mobile terminal; nonisolated power combiner; outphasing transmitter; quality factor; size 90 nm; CMOS integrated circuits; CMOS technology; Inductors; Power amplifiers; Power combiners; Power generation; Transmission line measurements; Chireix outphasing; LINC; Power amplifier; Slab inductor; power combiner; transmission line; transmitter;
Conference_Titel :
Electronics, Circuits and Systems (ICECS), 2012 19th IEEE International Conference on
Conference_Location :
Seville
Print_ISBN :
978-1-4673-1261-5
Electronic_ISBN :
978-1-4673-1259-2
DOI :
10.1109/ICECS.2012.6463797
