Title :
Harmonic controlled three-way doherty amplifier with improved efficiency and linearity
Author :
Aleksandar Atanaskovi?;Nata?a Male?-Ili?;Bratislav Milovanovi?
Author_Institution :
Electronic Engineering, University of Nis, Aleksandra Medvedeva 14, 18000 Nis, Serbia
Abstract :
In this paper the operation behavior of three-way Doherty amplifier loaded with harmonic control circuit is analyzed, including the efficiency and linearity. Amplifier is designed in configuration with two quarter-wave impedance transformers in the output combining circuit with LDMOSFETs in carrier and peaking amplifies in periphery relations 1:2.5:2.5. The signals for linearization: the fundamental signals´ second harmonics-IM2 and fourth-order nonlinear signals-IM4 are extracted at the output of peaking cells suppressing the third-and fifth order intermodulation products of Doherty amplifier.
Keywords :
"Linearity","Circuits","Impedance","High power amplifiers","Linearization techniques","Operational amplifiers","Power system harmonics","Power amplifiers","Harmonic analysis","Transformers"
Conference_Titel :
Telecommunication in Modern Satellite, Cable, and Broadcasting Services, 2009. TELSIKS ´09. 9th International Conference on
Print_ISBN :
978-1-4244-4382-6
DOI :
10.1109/TELSKS.2009.5339495
