Title :
High-temperature superconducting resonators
Author :
Taber, R.C. ; Hollenhorst, James N. ; Cutler, Leonard S. ; Bagwell, Tim L. ; Newman, Nathan ; Cole, Brady F.
Author_Institution :
Hewlett-Packard Lab., Palo Alto, CA, USA
fDate :
5/1/1992 12:00:00 AM
Abstract :
Preliminary measurements on high-T/sub c/ superconducting resonators are reported and why they are attractive candidates for incorporation in low-noise oscillators is discussed. Some of the important contributions to oscillator noise are reviewed and how they depend on the resonator parameters is shown. A preliminary YBaCu/sub 3/O/sub 7//LaAlO/sub 3/ resonator with a Q of 9*10/sup 4/ at 6.9 GHz and 7*10/sup 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 :
barium compounds; cavity resonators; electron device noise; high-temperature superconductors; lanthanum compounds; random noise; superconducting devices; yttrium compounds; 1/f component coefficient; 3.5 GHz; 6.9 GHz; 60 K; YBaCu/sub 3/O/sub 7/-LaAlO/sub 3/ resonator; cavity resonator; fractional-frequency fluctuations; high temperature superconductors; high-T/sub c/ superconducting resonators; low-noise oscillators; oscillator noise; power dependence; residual phase noise; resonator parameters; temperature sensitivity; 1f noise; Circuit noise; Frequency; High temperature superconductors; Oscillators; Phase noise; Superconducting device noise; Superconducting microwave devices; Superconducting transition temperature; Temperature dependence;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
