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Abstract
The microwave properties of YBCO/Ba0.05Sr0.95TiO3 (BST5) and Ag/Ba0.5Sr0.5TiO3 (BST50) films were characterized at 80 K and 290 K. At zero bias, the BST5 had a permittivity of 400 and a loss tangent of 0.02; the BST50 had a permittivity of 900 and a loss tangent of 0.1. The respective tunabilities at 3.6 V m- 1 were 15% and 44%. Analysis of the performance of phase shifters and tunable filters based on these films showed that both conductor and dielectric losses need to be considered in the selection of materials for devices. A high tunability alone does not guarantee good performance.
Original language | English |
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Pages (from-to) | 170-178 |
Number of pages | 9 |
Journal | Ferroelectrics |
Volume | 367 |
Issue number | 1 PART 1 |
DOIs | |
Publication status | Published - 1 Jan 2008 |
Keywords
- tunable filter
- ferroelectric
- BST thin film
- phase shifter
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Dive into the research topics of 'BaxSr1 - xTiO3 Thin Films for Tunable Microwave Devices in Cryogenic and Room Temperature Application'. Together they form a unique fingerprint.Projects
- 1 Finished
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Advanced Microwave Devices for Frequency-Agile Applications
Lancaster, M. (Principal Investigator) & Jackson, T. (Co-Investigator)
Engineering & Physical Science Research Council
28/11/05 → 27/05/09
Project: Research Councils