Cooled, ultra-high Q, sapphire dielectric resonators for low noise, microwave signal generation

Author

Driscoll, M.M. ; Haynes, J.T. ; Horwitz, S.S. ; Jelen, R.A. ; Weinert, R.W. ; Gavaler, J.R. ; Talvacchi, J. ; Wagner, G.R. ; Zaki, K.A. ; Liang, Xiao-Peng

Author_Institution

Westinghouse Electron. Syst. Group, Baltimore, MD, USA

fYear

1991

fDate

29-31 May 1991

Firstpage

700

Lastpage

706

Abstract

It is shown that with high-quality, large-area YBCO films and simple, styrofoam mounts, unloaded X-band Q values of over 250 thousand are attainable for TE₀₁ mode operation of a sapphire dielectric resonator (DR) operated at 77 K and employing high-temperature superconducting (HTS) films installed in the DR enclosure covers. Rigorous analysis for the determination of resonator frequency, modes, and unloaded Q have been carried out using mode matching techniques. The results of both analysis and prototype device evaluation experiments are compared for resonators fabricated using enclosures consisting of conventional metal sidewalls and covers using HTS films as a function of cover conductivity

Keywords

Q-factor; cryogenics; dielectric resonators; high-temperature superconductors; microwave devices; microwave generation; sapphire; superconducting devices; superconducting thin films; 77 K; Al₂O₃; TE₀₁ mode operation; YBaCuO films; cooled resonators; cover conductivity; microwave signal generation; mode matching techniques; sapphire dielectric resonators; styrofoam mounts; unloaded X-band Q values; Dielectrics; Frequency; Microwave generation; Microwave oscillators; Noise generators; Noise level; Phase noise; Signal generators; Superconducting device noise; Superconducting films;

fLanguage

English

Publisher

ieee

Conference_Titel

Frequency Control, 1991., Proceedings of the 45th Annual Symposium on

Conference_Location

Los Angeles, CA

Print_ISBN

0-87942-658-6

Type

conf

DOI

10.1109/FREQ.1991.145970

Filename

145970