Please use this identifier to cite or link to this item: https://doi.org/10.1088/0953-2048/20/1/014
Title: Planar tunable high-temperature superconductor microwave broadband phase shifter with patterned ferroelectric thin film
Authors: Wang, P. 
Tan, C.Y. 
Ma, Y.G. 
Cheng, W.N.
Ong, C.K. 
Issue Date: 1-Jan-2007
Citation: Wang, P., Tan, C.Y., Ma, Y.G., Cheng, W.N., Ong, C.K. (2007-01-01). Planar tunable high-temperature superconductor microwave broadband phase shifter with patterned ferroelectric thin film. Superconductor Science and Technology 20 (1) : 77-80. ScholarBank@NUS Repository. https://doi.org/10.1088/0953-2048/20/1/014
Abstract: A planar tunable high-temperature superconductor (HTS) microwave phase shifter with patterned ferroelectric thin film is presented in this paper. The circuit is based on a coplanar strip (CPS) transmission line periodically loaded with planar varactors. The CPS line is transformed to microstrip input/output by baluns. The patterning of the ferroelectric thin film reduces the conductor loss and eliminates unwanted tuning comparing with circuits where a whole layer of ferroelectric thin film is used. The circuit is optimized for high tunability following analytical equations. The phase shifter thus fabricated has a broadband response from 7 to 11GHz. At 200V DC bias, an average phase shift of 20° is achieved. © IOP Publishing Ltd.
Source Title: Superconductor Science and Technology
URI: http://scholarbank.nus.edu.sg/handle/10635/97553
ISSN: 09532048
DOI: 10.1088/0953-2048/20/1/014
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