| 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 |
