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Characterizing a varactor contribution to the residual distortion of load-modulated PAs

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4 Author(s)
Aballo, T. ; Dept. of Commun. Eng. (DICOM), Univ. of Cantabria, Santander, Spain ; Marante, R. ; Garcia, J.A. ; Mediavilla, A.

In this paper, a technique for extracting the Taylor series expansion coefficients of a varactor reactive nonlinearity is presented. A single diode and a dual-device antiseries (back-to-back cathode) combination have been characterized, aimed to accurately control their contribution to the residual intermodulation distortion (IMD) appearing in load-modulated power amplifiers (PAs). A test set-up for dynamically measuring the harmonic content has been implemented, able to be extended to the evaluation of load-based envelope tracking transmitters.

Published in:

Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMIC), 2011 Workshop on

Date of Conference:

18-19 April 2011