Thermal stabilization of microwave sapphire resonator references
Kersale, Y.; Giordano, V.; Vieudrin, F.L.; Lajoie, I.; Chaubet, M.
Frequency and Time Forum, 1999 and the IEEE International Frequency Control Symposium, 1999., Proceedings of the 1999 Joint Meeting of the European
Volume 2, Issue , 1999 Page(s):585 - 588 vol.2
Digital Object Identifier   10.1109/FREQ.1999.841373
Summary:Sapphire single crystal, associated with a special mode configuration (whispering gallery mode), is an ideal material for the realisation of high Q microwave resonator. Unfortunately, the frequency sensitivity to temperature fluctuations is relatively high. With such a sensitivity it is impossible to reach high frequency stability over a long time interval without efficient temperature regulation. We implemented original thermal regulation scheme on different sapphire resonators. We report, in this paper, frequency stability measurements of temperature controlled sapphire resonator oscillator at room temperature and at liquid nitrogen temperature

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