An improved dielectric resonator method for surface impedance measurement of high-T/sub c/ superconductors

Author

Kobayashi, Y. ; Kayano, H.

Author_Institution

Dept. of Electr. Eng., Saitama Univ., Japan

fYear

1992

fDate

1-5 June 1992

Firstpage

1031

Abstract

An improved dielectric resonator method is proposed to measure the temperature characteristics of the surface impedance Z/sub s/ of superconductors automatically and with high resolution and good reproducibility. A perturbation formula for this resonator is derived to determine Z/sub s/ from measured values of resonant frequency and unloaded Q. Some measured results verified the usefulness of this method. A consideration of the effect of surface roughness was used to compare measured temperature dependence of the complex conductivity with the BCS model and three-fluid models.<>

Keywords

dielectric resonators; electric impedance measurement; high-temperature superconductors; microwave measurement; surface topography; 9.7 GHz; BCS model; BiPbSrCaCuO; ErBaCuO; YBaCuO; complex conductivity; dielectric resonator method; high temperature superconductors; microwave component design; perturbation formula; resonant frequency; surface impedance measurement; surface roughness; temperature characteristics; three-fluid models; unloaded Q; Dielectric measurements; Frequency measurement; Impedance measurement; Q measurement; Reproducibility of results; Resonant frequency; Rough surfaces; Superconductivity; Surface impedance; Temperature measurement;

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.1992.188167

Filename

188167