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

fYear

2012

fDate

9-12 Dec. 2012

Firstpage

65

Lastpage

68

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ICECS.2012.6463797

Filename

6463797