Title :
Microwave measurements of surface impedance of high-Tc superconductors using two modes in a dielectric rod resonator
Author :
Kobayashi, Yoshio ; Yoshikawa, Hiromichi
Author_Institution :
Dept. of Electr. & Electron. Eng., Saitama Univ., Urawa, Japan
fDate :
12/1/1998 12:00:00 AM
Abstract :
A novel technique using two resonant modes in a dielectric rod resonator, the TE021 and TE012 modes, is proposed to measure the surface impedance Zs=Rs+jXs , where Rs is the surface resistance and Xs is the surface reactance of high-Tc superconductors at microwave frequency. The temperature dependence of Zs can be obtained from only one time measurement as a function of temperature, although the conventional two-resonator method needs to repeat the measurement for temperature twice. The high precision in the Rs measurement is comparable to the conventional two-resonator method using two ceramic rod resonators, The excellent repeatability in the Xs measurement is superior to that of the two-resonator method
Keywords :
dielectric resonators; electric impedance measurement; high-temperature superconductors; microwave measurement; TE012 mode; TE021 mode; dielectric rod resonator; high-Tc superconductors; microwave measurements; precision; repeatability; resonant modes; surface impedance; time measurement; Dielectric measurements; Impedance measurement; Microwave measurements; Resonance; Surface impedance; Surface resistance; Tellurium; Temperature dependence; Temperature measurement; Time measurement;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
