Analysis and design of a wideband high efficiency CMOS outphasing amplifier

Author

van Schie, M.C.A. ; van der Heijden, Mark P. ; Acar, M. ; de Graauw, A.J.M. ; de Vreede, Leo C. N.

Author_Institution

Delft Univ. of Technol., Delft, Netherlands

fYear

2010

fDate

23-25 May 2010

Firstpage

399

Lastpage

402

Abstract

This work presents the analysis and design of a novel transformer-based power combining network for an efficient outphasing power amplifier (PA). The proposed power combining network was implemented on PCB together with two 65nm CMOS class-E PA´s. Measurements show a peak output power of more than 30dBm over a 29% bandwidth around 700MHz. The peak output power at 700MHz equals 33.9dBm. The 10dB back-off efficiency is larger than 27.3% over the same 29% bandwidth. The 6dB back-off efficiency is larger than 46.4% over this bandwidth. The drain efficiency at 650MHz is larger than 50% over a 10dB power back-off range, which is, to our best knowledge, the highest back-off efficiency reported in a CMOS outphasing PA to date.

Keywords

CMOS integrated circuits; power amplifiers; printed circuits; transformers; PCB; frequency 650 MHz; frequency 700 MHz; outphasing power amplifier; size 65 nm; transformer-based power combining network; wideband high efficiency CMOS outphasing amplifier; Admittance; Amplitude modulation; Bandwidth; Broadband amplifiers; Linearity; Phase modulation; Power amplifiers; Power combiners; Power generation; Transmitters; CMOS; Chireix; LINC; Outphasing; power amplifiers; power combiner; transformer;

fLanguage

English

Publisher

ieee

Conference_Titel

Radio Frequency Integrated Circuits Symposium (RFIC), 2010 IEEE

Conference_Location

Anaheim, CA

ISSN

1529-2517

Print_ISBN

978-1-4244-6240-7

Type

conf

DOI

10.1109/RFIC.2010.5477315

Filename

5477315