Title :
Linearization of multi-carrier power amplifiers
Author :
Johansson, Mats ; Mattsson, Thomas ; Sundström, Lars ; Faulkner, Michael
Author_Institution :
Dept. of Appl. Electron., Lund Univ., Sweden
Abstract :
A new method to increase the linearity and efficiency of multicarrier power amplifiers (MCPAs) is described. The use of Cartesian feedback for intermodulation reduction is investigated, and it is shown that appropriate control over the feedback loop phase shift can result in substantial reduction in intermodulation over broad bandwidths. Simulation results show that unwanted intermodulation products could be suppressed by 10-30 dB
Keywords :
feedback amplifiers; interference suppression; intermodulation; land mobile radio; linearisation techniques; phase control; power amplifiers; radiofrequency interference; wideband amplifiers; Cartesian feedback; efficiency; feedback loop phase shift; intermodulation reduction; linearity; multicarrier power amplifiers; Band pass filters; Bandwidth; Base stations; Broadband amplifiers; Feedback loop; High power amplifiers; Linearity; Linearization techniques; Power amplifiers; Radio transmitters;
Conference_Titel :
Vehicular Technology Conference, 1993., 43rd IEEE
Conference_Location :
Secaucus, NJ
Print_ISBN :
0-7803-1267-8
DOI :
10.1109/VETEC.1993.508784
