Title :
A compact tuneable output network for high efficient chireix outphasing power amplifier design
Author :
Liu, Rui ; Schreurs, Dominique ; De Raedt, Walter ; Mertens, Robert
Author_Institution :
Div. ESAT-TELEMIC, K.U. Leuven, Leuven, Belgium
Abstract :
This paper reviews up-to-date Chireix outphasing power amplifier configurations and proposes a compact adaptive power combining network. It yields a lower loss and compact size over conventional architectures. Multilevel drive modulation is introduced to further improve the efficiency at low power level. The proposed concept was verified by standard CMOS 0.18 μm with a 1.8 V power supply at 5.2 GHz. The simulation results show that the PA exhibits a 17.4 dBm maximum output power, together with 30% PAE at 7 dB power back-off region. Compared with the conventional class-AB PA, the PAE improvement is 12% and 14% at 7 dB and 3 dB power back-off regions, respectively.
Keywords :
CMOS integrated circuits; modulation; power amplifiers; CMOS; compact adaptive power combining network; compact tuneable output network; frequency 5.2 GHz; high efficient Chireix outphasing power amplifier design; multilevel drive modulation; size 0.18 mum; voltage 1.8 V; High power amplifiers; Linearity; Peak to average power ratio; Power amplifiers; Power combiners; Power generation; Radio frequency; Radiofrequency amplifiers; Signal generators; Tunable circuits and devices; Chireix amplifier; LINC; RF power amplifier; adaptive matching; integration; outphasing; power combining;
Conference_Titel :
Integrated Nonlinear Microwave and Millimeter-Wave Circuits (INMMIC), 2010 Workshop on
Conference_Location :
Goteborg
Print_ISBN :
978-1-4244-7410-3
Electronic_ISBN :
978-1-4244-7412-7
DOI :
10.1109/INMMIC.2010.5480135
