Linearization of symmetrical and asymmetrical two-way Doherty amplifier
Author(s) -
Aleksandar Atanasković,
Nataša MalešIlić,
Bratislav Milovanović
Publication year - 2012
Publication title -
facta universitatis - series electronics and energetics
Language(s) - English
Resource type - Journals
eISSN - 2217-5997
pISSN - 0353-3670
DOI - 10.2298/fuee1202161a
Subject(s) - linearization , amplifier , harmonics , intermodulation , control theory (sociology) , nonlinear system , mathematics , direct coupled amplifier , linearity , electronic engineering , engineering , computer science , operational amplifier , electrical engineering , physics , voltage , control (management) , cmos , quantum mechanics , artificial intelligence
The linearization effects on two-way Doherty amplifiers are presented in this paper. Symmetrical Doherty amplifier with the additional circuit for linearization has been realized and measurements of the linearization influence on the third- and fifth-order intermodulation products have been carried out. Asymmetrical Doherty amplifier has been designed and effects of the applied linearization technique have been considered through the simulation process. The linearization approach uses the fundamental signals’ second harmonics and fourth-order nonlinear signals that are extracted at the output of the peaking cell, adjusted in amplitude and phase and injected at the input and output of the carrier cell in Doherty amplifier. [Projekat Ministarstva nauke Republike Srbije, br. TR-32052]
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