This paper presents a study of the nonlinear effects introduced by MEMS varactors when excited with digitally modulated RF signals (QPSK and 16 QAM). The study is based on simulating a nonlinear model of the MEMS device using harmonic-balance and envelope solvers, and on experimental measurements of the wave reflected by the on-wafer MEMS device. It is shown that the adjacent-channel power ratio (ACPR) and error-vector magnitude (EVM) of the digital signal suffer a degradation due to the device nonlinear distortion.
CitationLázaro, A.; Girbau, D.; Pradell, L. Distortion produced by RF MEMS varactors on digital communication signals. Microwave and optical technology letters, 2006, vol. 48, núm. 2, p. 246-249.
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