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Microwave properties of Ba0.5Sr0.5TiO3 thin film coplanar phase shifters

Suherman, P. M., Jackson, T. J., Tse, Y. Y., Jones, I. P., Chakalova, R. I., Lancaster, M. J. and Porch, Adrian 2006. Microwave properties of Ba0.5Sr0.5TiO3 thin film coplanar phase shifters. Journal of Applied Physics 99 (10) , 140101. 10.1063/1.2198933

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Coplanar waveguide transmission lines have been used to show that the temperature dependent properties of Ba0.5Sr0.5TiO3 thin films used for microwave phase shifters in the frequency range 45 MHz–50 GHz are correlated strongly with the microstructure of the films. The highest tunability and figure of merit of the phase shifters were obtained for films with the narrowest ferroelectric-paraelectric phase transition range, lowest mosaic spread, and widest columnar microstructure. The study also showed that the operating temperature plays an important role in achieving the optimum phase shift for microwave applications.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Uncontrolled Keywords: microwave materials, barium compounds, strontium compounds, coplanar transmission lines, coplanar waveguides, microwave phase shifters, crystal microstructure, ferroelectric materials, ferroelectric thin films
Additional Information: 7 pp.
Publisher: American Institute of Physics
ISSN: 0021-8979
Last Modified: 04 Jun 2017 02:04

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