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Proceedings Paper

Microstrip resonator using high-Tc superconducting thin film on sapphire substrates
Author(s): O. D. Pustylnik
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Paper Abstract

We have measured very low microwave losses in Y-Ba-Cu-0 fifth wave ring re- sonators. We deposited the Y-Ba-Cu-0 film on (1012) non-buffered sapphire sub- strates and patterned microwave circuites. High-Tc microstrip resonators de- monstrated best Q-factor greater then 800 at 31 GHz, corresponding to surfaceresistences less than 3,0 mohm. Indetical copper resonator showed Q's of 500and surface resistance of 27 mohm. We show that the losses in the high losssamples can be accounted for by the presence of small fractions of c-axis- aligned grains highly misaligned in the plane of those films. Volume fractionof highly misagned c-axis-oriented grains as 3% lead to losses above 3 mohm.

Paper Details

Date Published: 30 August 1993
PDF: 5 pages
Proc. SPIE 2104, 18th International Conference on Infrared and Millimeter Waves, 21046T (30 August 1993); doi: 10.1117/12.2298677
Show Author Affiliations
O. D. Pustylnik, Scientific Research Ctr. "Fonon" (Ukraine)

Published in SPIE Proceedings Vol. 2104:
18th International Conference on Infrared and Millimeter Waves
James R. Birch; Terence J. Parker, Editor(s)

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