Barium strontium titanate thin film varactors for room-temperature microwave device applications Bao, P; Jackson, T J; Wang, X; Lancaster, M J [Department of Electronic, Electrical and Computer Engineering, University of Birmingham, Birmingham, B15 2TT (United Kingdom)], E-mail: p.bao@bham.ac.uk 36 MATERIALS SCIENCE; BARIUM COMPOUNDS; EQUIPMENT; FABRICATION; MICROWAVE RADIATION; STRONTIUM TITANATES; TEMPERATURE RANGE 0273-0400 K; THIN FILMS; VARIABLE CAPACITANCE DIODES Recent progress in the development of barium strontium titanate thin film varactors for room temperature tunable microwave devices applications is reviewed, with emphasis on efforts towards the improvement in the quality of BST thin films and the fabrication issues crucial for the performance of microwave devices based on BST varactors. The paper provides examples of tunable microwave devices employing BST varactors. Other thin film materials currently competing with BST thin films are discussed. Topics which deserve further investigation are suggested. (topical review) Available from http://dx.doi.org/10.1088/0022-3727/41/6/063001;INIS United Kingdom 2008-03-21 English Journal Article Journal Name: Journal of Physics. D, Applied Physics; Journal Volume: 41; Journal Issue: 6; Other Information: PII: S0022-3727(08)62215-9; DOI: 10.1088/0022-3727/41/6/063001; Country of input: International Atomic Energy Agency (IAEA) Medium: X; Size: 21 pages https://doi.org/10.1088/0022-3727/41/6/063001; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA) [] 6 41 Journal ID: ISSN 0022-3727; JPAPBE; TRN: GB08Q7679062995 GBN 2010-01-01 21190710