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

fYear

2009

fDate

17-19 March 2009

Firstpage

1

Lastpage

8

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Radio Science Conference, 2009. NRSC 2009. National

Conference_Location

New Cairo

ISSN

1110-6980

Print_ISBN

978-1-4244-4214-0

Type

conf

Filename

5233956