Title :
Experimental characterization of LINC outphasing combiners´ efficiency and linearity
Author :
Poitau, Gwenael ; Birafane, Ahmed ; Kouki, Ammar
Author_Institution :
LACIME - Ecole de Technologie Superieure, Montreal, Que., Canada
Abstract :
In this paper, an experimental characterization of the efficiency and linearity of resistive and outphasing combiners for linear amplification using non linear components (LINC) amplifiers is presented. The combining efficiency is measured for three combiners, i.e., one Wilkinson combiner and two Chireix combiners, with different electric stub lengths. The measured results are compared to theoretical predictions for the three cases. The nonlinear effects of Chireix combiners are highlighted and phase adjustment of one of the system´s branches is proposed to linearize it. We show that linearization is feasible in this manner only at the expense of reduced efficiency.
Keywords :
UHF circuits; linearisation techniques; power combiners; 2.1 GHz; Chireix combiner; LINC amplifiers; LINC outphasing combiners; UHF transmitters; Wilkinson combiner; combiner linearity; combiner nonlinear effects; combiner power efficiency; electric stub length; linear amplification using non linear components; linearization; outphasing combiners; resistive combiners; system branch phase adjustment; Communication systems; Electric variables measurement; Impedance; Length measurement; Linearity; Nonlinear distortion; Particle separators; Power amplifiers; Transmitters; Voltage;
Conference_Titel :
Radio and Wireless Conference, 2004 IEEE
Print_ISBN :
0-7803-8451-2
DOI :
10.1109/RAWCON.2004.1389078
