Title :
Design of superconducting thin film microwave oscillators with weak variable thickness bridges
Author :
Burke, J.P. ; Hohenwarter, G.K.G. ; Beyer, J.B. ; Track, E.
Author_Institution :
Dept. of Electr. & Comput. Eng., Wisconsin Univ., Madison, WI, USA
fDate :
3/1/1993 12:00:00 AM
Abstract :
Oscillator designs based on superconducting variable-thickness bridge devices have been developed. Design considerations and constraints in the layout and fabrication of the circuits are discussed, and a test fixture suitable for circuit testing is described. Circuits fabricated with YBCO films were tested, but do not yet show the desired operating properties. Preliminary tests indicated poor film quality as the cause. Multiple oscillator designs operating at 40 GHz have been designed and simulated and are currently being tested using YBCO on LaAlO/sub 3/. Simulations were limited by the availability of specific simulation models for individual components.<>
Keywords :
equivalent circuits; high-temperature superconductors; microwave integrated circuits; microwave oscillators; network synthesis; superconducting integrated circuits; superconducting junction devices; superconducting microwave devices; superconducting thin films; thin film circuits; LaAlO/sub 3/; YBaCuO-LaAlO/sub 3/; fabrication; flux flow transistor; layout; simulation models; test fixture; thin film microwave oscillators; weak variable thickness bridges; Bridge circuits; Circuit testing; Fabrication; Fixtures; Microwave oscillators; Superconducting devices; Superconducting films; Superconducting microwave devices; Superconducting thin films; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
