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1 July 1991 Coplanar waveguide microwave filter of YBa2Cu3O7
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Thin film low-pass microwave filters have been made with laser-ablated YBa2Cu3O(7-delta) (YBCO) deposited on LaAlO3 substrates, using a coplanar waveguide structure. The coplanar waveguide sections had dimensions suited for integrated circuits. Measured losses in liquid nitrogen were superior to the loss in a similar thin-film copper filter throughout the 0 to 9.5 GHz pass-band. A simple transmission-line model is adequate for filter design using YBCO films with repeatable characteristics. The measured filters demonstrate the performance of fully patterned YBCO after sealing in space-qualifiable hermetic packages. Five packaged filters of this design were delivered to the Naval Research Laboratory as candidates for space flight in the High Temperature Superconductivity Space Experiment.
© (1991) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Wilbert Chew, A. Lance Riley, Daniel L. Rascoe, Brian D. Hunt, Marc C. Foote, Thomas W. Cooley, and Louis J. Bajuk "Coplanar waveguide microwave filter of YBa2Cu3O7", Proc. SPIE 1477, Superconductivity Applications for Infrared and Microwave Devices II, (1 July 1991);

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