A Large-Signal Model of Ferroelectric Thin-Film Transmission Lines"
Eduard Rocas, Juan C. Collado Gomez, Jordi Mateu, Nate Orloff, James Booth, Juan M. O'C allaghan
"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."
IEEE Transactions on Microwave Theory and Techniques
, Collado Gomez, J.
, Mateu, J.
, Orloff, N.
, Booth, J.
and O'C allaghan, J.
A Large-Signal Model of Ferroelectric Thin-Film Transmission Lines", IEEE Transactions on Microwave Theory and Techniques
(Accessed February 28, 2024)