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|Title:||Planar tunable high-temperature superconductor microwave broadband phase shifter with patterned ferroelectric thin film|
|Authors:||Wang, P. |
|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|
|Appears in Collections:||Staff Publications|
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