✦ LIBER ✦

High Q tunable sapphire loaded cavity resonator for cryogenic operation

✍ Scribed by D.G. Blair; A.M. Sanson

Publisher: Elsevier Science
Year: 1989
Tongue: English
Weight: 438 KB
Volume: 29
Category: Article
ISSN: 0011-2275
DOI: 10.1016/0011-2275(89)90258-0

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✦ Synopsis

This paper describes a tunable sapphire loaded microwave cavity resonator for cryogenic operation. The resonator exploits the low loss properties of sapphire at cryogenic temperatures. It is tuned by a movable sapphire tuning piece operated by stepping motors, which allow high Q resonant modes throughout the X-band to be accessed and tuned to a resolution of a few hundred Hz. The stepping motor modifications that were made to obtain reliable cryogenic operation are also discussed.