Extraction of a nonlinear amplifier model from measured characteristics
Aladdin H. Assisi, Ahmad Sileem Mahmoud, Mustafa M. Ahmad · National Radio Science Conference · 2009
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.