Title :
Low phase noise temperature-compensated cryogenic whispering gallery mode resonator operated at 63 K in a closed cycle cooler
Author :
Hao, L. ; Gallop, J.C. ; Klein, N. ; Winter, M.
Author_Institution :
Nat. Phys. Lab., Teddington, UK
Abstract :
Whispering gallery modes in a miniature temperature compensated composite dielectric resonator (at T/spl sim/63 K) can exhibit loaded Q/sub L/ values above 10/sup 7/ at /spl sim/10 GHz, close to the Cs atomic clock frequency. The high Q of the dielectric resonators can be used to produce low phase noise oscillators limited only by the performance of amplifiers and mixers. Effective mechanical vibration isolation is also demonstrated in a Gifford-McMahon cooler.
Keywords :
Compensation; Cooling; Dielectric resonator oscillators; Feedback oscillators; Frequency stability; Frequency standards; Microwave measurement; Microwave oscillators; Phase noise; Refrigeration; Vibration isolation; 10 GHz; 63 K; Gifford-McMahon cooler; atomic clock frequency region; closed cycle cooler; cryogenic whispering gallery mode resonator; feedback circuit; high-Q dielectric resonators; loop oscillator system; low phase noise oscillators; low phase noise temperature-compensated; mechanical vibration isolation; miniature composite dielectric resonator; stable frequency standards; Atomic clocks; Cryogenics; Dielectrics; Frequency; Low-noise amplifiers; Oscillators; Phase noise; Temperature; Vibrations; Whispering gallery modes;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 2000 Conference on
Conference_Location :
Sydney, NSW, Australia
Print_ISBN :
0-7803-5744-2
DOI :
10.1109/CPEM.2000.850869
