Ultra-stable cryogenic sapphire dielectric microwave resonators: mode frequency-temperature compensation by residual paramagnetic impurities

Residual paramagnetic impurities in a sapphire monocrystal multi-mode resonator can provide a means of temperature compensation so that the effect of temperature fluctuations on the frequency of an ultra-stable cryogenic microwave oscillator can be reduced to second order. Modes investigated at X-ba...

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Veröffentlicht in:	Journal of physics. D, Applied physics Applied physics, 1992-07, Vol.25 (7), p.1105-1109
Hauptverfasser:	Mann, A G, Giles, A J, Blair, D G, Buckingham, M J
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Circuit properties Electric, optical and optoelectronic circuits Electronics Exact sciences and technology Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits Physical Sciences Physics Physics, Applied Science & Technology
Online-Zugang:	Volltext
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Zusammenfassung:	Residual paramagnetic impurities in a sapphire monocrystal multi-mode resonator can provide a means of temperature compensation so that the effect of temperature fluctuations on the frequency of an ultra-stable cryogenic microwave oscillator can be reduced to second order. Modes investigated at X-band in 3 and 5 cm diameter resonators exhibited a wide range of effective paramagnetic filling factors, and frequency-temperature turning points in the range 5 to 13 K. The observations agree well with theory.
ISSN:	0022-3727 1361-6463
DOI:	10.1088/0022-3727/25/7/012