The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 22, 2005
Filed:
Aug. 18, 2003
Michael R. Beylor, Tucson, AZ (US);
Wesley H. Dwelly, Sahuarita, AZ (US);
Vinh Adams, Tucson, AZ (US);
Dennis C. Braunreiter, Oro Valley, AZ (US);
Harry A. Schmitt, Tucson, AZ (US);
Michael R. Beylor, Tucson, AZ (US);
Wesley H. Dwelly, Sahuarita, AZ (US);
Vinh Adams, Tucson, AZ (US);
Dennis C. Braunreiter, Oro Valley, AZ (US);
Harry A. Schmitt, Tucson, AZ (US);
Raytheon Company, Waltham, MA (US);
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.