Title :
Extraction of a nonlinear amplifier model from measured characteristics
Author :
Assisi, Aladdin H. ; Mahmoud, Ahmad Sileem ; Ahmad, Mustafa M.
Author_Institution :
Egyptian Armed Forces, Egypt
Abstract :
In this paper a mathematical analysis to extract a nonlinear amplifier model from measured characteristics was developed and verified on a case study. Two methods were proposed. The first can be used to extract a fifth order polynomial model by inserting a sine wave at the amplifier input and measuring the output harmonics at different input power levels. It can be used to estimate other nonlinear behaviors of the amplifier; such as intermodulation and desensitization. The other model can be extracted by measuring the two-tone intermodulation spectrum and deduce other amplifier characteristics. Both methods were mathematically analyzed and experimentally verified.
Keywords :
amplifiers; intermodulation; mathematical analysis; polynomials; fifth order polynomial model; mathematical analysis; nonlinear amplifier model; two-tone intermodulation spectrum; Broadband amplifiers; Curve fitting; Degradation; Distortion measurement; Force measurement; Mathematical model; Performance gain; Polynomials; Power amplifiers; Power measurement;
Conference_Titel :
Radio Science Conference, 2009. NRSC 2009. National
Conference_Location :
New Cairo
Print_ISBN :
978-1-4244-4214-0
