Title :
FET diode linearizer optimization for amplifier predistortion in digital radios
Author :
Haskins, Christopher ; Winslow, Thomas ; Raman, Sanjay
Author_Institution :
Dept. of Electr. & Comput. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA
fDate :
1/1/2000 12:00:00 AM
Abstract :
This letter presents the initial results of a study on a diode-based power amplifier (PA) linearization technique. The optimization of a diode´s parameters to match a MESFET PA is discussed. The relevance of AM-AM and AM-PM curves to linearity requirements and modulation format is also discussed. As much as a 6.7-dB improvement in ACPR is made in the upper channel using a series diode linearizer
Keywords :
MMIC power amplifiers; UHF integrated circuits; UHF power amplifiers; adjacent channel interference; digital radio; electric distortion; field effect MMIC; linearisation techniques; ACPR; AM-AM curves; AM-PM curves; FET diode linearizer; amplifier predistortion; digital radios; diode-based power amplifier; linearity requirements; linearizer optimization; modulation format; series diode linearizer; upper channel; Circuits; Diodes; FETs; Hardware; Linearity; MESFETs; Modulation; Power amplifiers; Predistortion; Radio frequency;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
