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Publications (3/3 displayed)
- 2014Uncertainties in the permittivity of thin films extracted from measurements with near field microwave microscopy calibrated by an image charge modelcitations
- 2006Temperature Dependent Dielectric Properties of Coplanar Phase Shifters Fabricated from Ba₀.₅SR₀.₅Ti0₃ Thin Filmscitations
- 2006Microwave and Microstructural Properties of Ba₀.₅Sr₀.₅TiO₃ of Thin Film Coplanar Phase Shifterscitations
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article
Temperature Dependent Dielectric Properties of Coplanar Phase Shifters Fabricated from Ba₀.₅SR₀.₅Ti0₃ Thin Films
Abstract
This paper presents an analysis of the temperature dependent properties and performance of coplanar waveguide transmission lines on Ba0.5Sr0.5TiO3 (BST) thin films. Comparison of the temperature dependent permittivity at microwave frequencies with models of heterogeneous ferroelectrics reveals significant physical properties, such as the Curie temperature, Curie-Weiss constant, and statistical defects in the films. The maximum phase shift and tunability are obtained at the temperature where the permittivity is highest.