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Publication Citation: A Large-Signal Model of Ferroelectric Thin-Film Transmission Lines"

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Author(s): Eduard Rocas; Juan C. Collado Gomez; Jordi Mateu; Nathan D. Orloff; James C. Booth; Juan M. O'C allaghan;
Title: A Large-Signal Model of Ferroelectric Thin-Film Transmission Lines"
Published: December 01, 2011
Abstract: "This work evaluates the microwave nonlinear properties and tuning at RF frequencies of ferroelectric Ba0.3Sr0.7TiO3 thin-films by on-wafer measurements of the second and third-order harmonics and intermodulation products of several coplanar transmission lines as a function of DC bias. We analyze this data by use of a large-signal circuit model to obtain the nonlinear distributed capacitance as a function of voltage. Whereas the model with a field-dependent dielectric constant of the ferroelectric material is able to predict the detuning when a DC voltage is applied and also the generated harmonics, it disagrees with the predicted third-order intermodulation products at frequencies 2w1-w2 and 2w2-w1. Self-heating mechanisms are also considered, along with an additional phenomenological source of nonlinearities, to model all the observables."
Citation: IEEE Transactions on Microwave Theory and Techniques
Volume: 59
Issue: 12
Pages: pp. 3059 - 3067
Research Areas: Thin-Films, Sensors, Nonlinear Optical Spectroscopy, Electromagnetics