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Proceedings Paper

Y-Ba-Cu-O microstrip resonators on sapphire substrates
Author(s): Oleg Pustylnik; Alexander D. Dymnikov; Igor V. Voinovsky; Oleg A. Khymenko
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Paper Abstract

We have measured very low microwave losses in Y-Ba-Cu-O fifth wave ring resonators. We deposited the Y-Ba-Cu-O film on (1012) non-buffered sapphire substrates and patterned microwave circuits. High-Tc microstrip resonators demonstrated best Q-factor greater then 800 at 31 GHz, corresponding to surface resistances less than 3,0 mOhm. Identical copper resonator showed Qs of 500 and surface resistance of 27 mOhm. We show that the losses in the high loss samples can be accounted for by the presence of small fractions of c- axis-aligned grains highly misapplied in the plane of those films. Volume fraction of highly misagned c-axis-oriented grains as 3% lead to losses above 3 mOhm.

Paper Details

Date Published: 19 August 1994
PDF: 3 pages
Proc. SPIE 2211, Millimeter and Submillimeter Waves, (19 August 1994);
Show Author Affiliations
Oleg Pustylnik, Scientific Research Ctr. (Ukraine)
Alexander D. Dymnikov, Scientific Research Ctr. (Ukraine)
Igor V. Voinovsky, Scientific Research Ctr. (Ukraine)
Oleg A. Khymenko, Scientific Research Ctr. (Ukraine)


Published in SPIE Proceedings Vol. 2211:
Millimeter and Submillimeter Waves
Mohammed N. Afsar, Editor(s)

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