High T/sub c/ superconductor-sapphire microwave resonator with extremely high Q-values up to 90 K

Author

Shen, Z.-Y. ; Wilker, C. ; Pang, P. ; Holstein, W.L.

Author_Institution

Du Pont Central Res. & Dev., Wilmington, DE, USA

fYear

1992

fDate

1-5 June 1992

Firstpage

193

Abstract

Several high-temperature-superconductor-sapphire TE/sub 011/ mode resonators were designed, fabricated, and tested. At 5.552 GHz, Q/sub 0/ reached 2*10/sup 6/ at 90 K, 3*10/sup 6/ at 80 K, and 1.4*10/sup 7/ at 4.2 K with circulating power up to 500 kW. Formulas for calculating the resonant frequency and Q-value were derived. These theoretical results showed good agreement with the experimental measurements. Applications such as frequency-stabilized oscillators and filters, and the characterizations of high-temperature superconductor films are discussed.<>

Keywords

Q-factor; high-temperature superconductors; resonators; sapphire; solid-state microwave devices; superconducting microwave devices; superconducting thin films; 4.2 to 90 K; 5.552 GHz; 500 kW; Q-value; TE/sub 011/ mode resonators; Tl/sub 2/Ba/sub 2/CaCu/sub 2/O/sub 8/ films; filters; frequency-stabilized oscillators; high-temperature superconductor films; microwave resonator; resonant frequency; Copper; Frequency measurement; High temperature superconductors; Oscillators; Resonant frequency; Resonator filters; Superconducting films; Superconducting microwave devices; Surface resistance; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 1992., IEEE MTT-S International

Conference_Location

Albuquerque, NM, USA

ISSN

0149-645X

Print_ISBN

0-7803-0611-2

Type

conf

DOI

10.1109/MWSYM.1992.187943

Filename

187943