High-temperature superconducting resonators
Los Angeles, CA（1991）
Abstract
The authors report preliminary measurements on high-Tc superconducting resonators and discuss why these resonators are attractive candidates for incorporation in low-noise oscillators. Some of the important contributions to oscillator noise are reviewed, and it is shown that they depend on the resonator parameters. A preliminary YBa2Cu3O7/LaAlO3 resonator with a Q of 9×104 at 6.9 GHz and 7×10 4 at 3.5 GHz has been fabricated. The temperature sensitivity, power dependence, and residual phase-noise are discussed. An upper limit on the coefficient of the 1/f component of fractional-frequency fluctuations has been measured to be -204 dB at 60 K
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Key words
q-factor,barium compounds,cavity resonators,electron device noise,high-temperature superconductors,superconducting devices,yttrium compounds,1/f component,3.5 ghz,6.9 ghz,60 k,laalo3 substrate,yba2cu3o7-laalo3,fractional-frequency fluctuations,high temperature superconductors,high-tc superconducting resonators,low-noise oscillators,oscillator noise contributions,power dependence,residual phase-noise,resonator parameters,superconducting resonators,temperature sensitivity,oscillations,phase noise,resonant frequency,q factor
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