Oscillators – Combined with particular output coupling network
Reexamination Certificate
2005-11-22
2005-11-22
Shingleton, Michael B. (Department: 2817)
Oscillators
Combined with particular output coupling network
C333S156000, C333S161000, C327S158000, C327S186000, C327S227000, C331S176000, C331S187000
Reexamination Certificate
active
06967539
ABSTRACT:
An oscillator to generate a low phase-noise reference signal at an oscillation frequency includes a frequency generator to generate the reference signal responsive to a control signal, and a delay element made of a high-temperature superconductor material. The delay element time-delays the reference signal and provides a low phase-noise time-delayed reference signal when cooled to a cryogenic temperature. The oscillator includes a phase detector to generate the control signal from a phase difference between the time-delayed reference signal and a phase-shifted reference signal. The delay element may comprise a coplanar waveguide having a length between 500 and 1000 meters arranged randomly on a substrate having a diameter of between five and thirteen centimeters. The delay element may provide a delay ranging from five to fifteen microseconds. The coplanar waveguide may be comprised of Yttrium-Barium-Copper Oxide disposed on either a Lanthanum-Aluminum Oxide or a Magnesium Oxide substrate.
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patent: 6377315 (2002-04-01), Carr et al.
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Koh et al. “Fabrication of Superconducting Delay Line with GaAs Schotty Didoe” IEEE transactions on Applied Superconductivity, vol. 9, No 2, Jun. 1999, pp3224-3227.
Ruggiero et al. “Superconducting Devices”Academic Press, INC. 1990, pp241-242.
Adams Vinh
Beylor Michael R.
Braunreiter Dennis C.
Dwelly Wesley H.
Schmitt Harry A.
Alkov Leonard
Finn Thomas J.
Raytheon Company
Shingleton Michael B.
Vick Karl
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