A novel predistortion approach well suited for MMIC design is discussed. The theoretical analysis shows third-order intermodulation product (IMP3) cancellation independent of the specific technology exploited for implementation and of the detailed behaviour of the power stage nonlinearity; further improvements can be obtained through optimization. The active stages of the predistorter are modeled through a nonlinear describing function, which can be experimentally characterized through standard LS S-parameters measurements. The predistortion scheme has been implemented within the Agilent ADS environment and applied to the linearity optimization of a power amplifier stage. In accordance with theoretical results, significant improvement in the linearity of the Pin-Pout is demonstrated together with IMP3 reduction. A sensitivity analysis on the optimization parameters is also presented, showing that this approach is robust and well suited for circuit design.
Optimum design of a new predistortion scheme for high linearity K-band MMIC power amplifiers / P., Bianco; DONATI GUERRIERI, Simona; Ghione, Giovanni; Pirola, Marco; Naldi, Carlo; C., Florian; G., Vannini; A., Santarelli; F., Filicori; L., Manfredi. - (2001), pp. 689-692. (Intervento presentato al convegno Gallium Arsenide applications symposium. Gaas 2001 tenutosi a London (GBR) nel 24-28 Sep. 2001).
Optimum design of a new predistortion scheme for high linearity K-band MMIC power amplifiers
DONATI GUERRIERI, Simona;GHIONE, GIOVANNI;PIROLA, Marco;NALDI, Carlo;
2001
Abstract
A novel predistortion approach well suited for MMIC design is discussed. The theoretical analysis shows third-order intermodulation product (IMP3) cancellation independent of the specific technology exploited for implementation and of the detailed behaviour of the power stage nonlinearity; further improvements can be obtained through optimization. The active stages of the predistorter are modeled through a nonlinear describing function, which can be experimentally characterized through standard LS S-parameters measurements. The predistortion scheme has been implemented within the Agilent ADS environment and applied to the linearity optimization of a power amplifier stage. In accordance with theoretical results, significant improvement in the linearity of the Pin-Pout is demonstrated together with IMP3 reduction. A sensitivity analysis on the optimization parameters is also presented, showing that this approach is robust and well suited for circuit design.Pubblicazioni consigliate
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https://hdl.handle.net/11583/1411089
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