公开(公告)号：US20050040902A1

公开(公告)日：2005-02-24

申请号：US10643278

申请日：2003-08-18

申请人： Michael Beylor ,  Wesley Dwelly ,  Vinh Adams ,  Dennis Braunreiter ,  Harry Schmitt

发明人： Michael Beylor ,  Wesley Dwelly ,  Vinh Adams ,  Dennis Braunreiter ,  Harry Schmitt

IPC分类号： H03B11/10 ,  H03L7/04 ,  H05B1/00

CPC分类号： H03L7/04

摘要： 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.