Design of superconducting thin film microwave oscillators with weak variable thickness bridges

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...

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Veröffentlicht in:	IEEE transactions on applied superconductivity 1993-03, Vol.3 (1), p.2539-2542
Hauptverfasser:	Burke, J.P., Hohenwarter, G.K.G., Beyer, J.B., Track, E.
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Bridge circuits Circuit properties Circuit testing Electric, optical and optoelectronic circuits Electronics Exact sciences and technology Fabrication Fixtures Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits Microwave oscillators Superconducting devices Superconducting films Superconducting microwave devices Superconducting thin films Yttrium barium copper oxide
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Beschreibung
Zusammenfassung:	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.< >
ISSN:	1051-8223 1558-2515
DOI:	10.1109/77.233536