Title :
High-temperature superconducting resonators
Author :
Hollenhorst, J.N. ; Taber, R.C. ; Cutler, L.S. ; Bagwell, T.L. ; Newman, N.
Author_Institution :
Hewlett-Packard Lab., Palo Alto, CA, USA
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
Keywords :
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; Q-factor; 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; Circuit noise; High temperature superconductors; Laboratories; Low-noise amplifiers; Microwave oscillators; Noise level; Resonant frequency; Superconducting device noise; Superconducting microwave devices; Superconducting transition temperature;
Conference_Titel :
Frequency Control, 1991., Proceedings of the 45th Annual Symposium on
Conference_Location :
Los Angeles, CA
Print_ISBN :
0-87942-658-6
DOI :
10.1109/FREQ.1991.145935
