Accession Number:

AD0617128

Title:

CRYOGENIC RADIO-FREQUENCY TUNER.

Descriptive Note:

Final rept. for 1 Jul 63-31 Dec 64,

Corporate Author:

AIRBORNE INSTRUMENTS LAB DEER PARK N Y

Report Date:

1964-12-31

Pagination or Media Count:

61.0

Abstract:

A superconducting RF tuner was successfully developed, and a packaged model suitable for experimental use was demonstrated. This unit has 1 a 3.3-to-1 tuning range of 6.3 to 21 Mc, 2 unloaded Qs ranging from 350,000 to 600,000 over the tuning band, 3 bandwidths adjustable from less than 400 cps to greater than 16 kc, 4 calibrated external controls for mainfrequency tuning, fine-frequency tuning and bandwidth, and 5 good resettability. An optimum circuit design was developed to obtain minimum variation with frequency consistent with minimizing resonant-frequency variation with bandwidth changes. Split-stator tuning capacitors were used to eliminate superconducting contact problems. The report describes the design considerations and initial superconducting circuit experiments, which yielded unloaded Qs as high as 2.2 million near 20 Mc at 4.2K, and the packaged cryogenic RF tuner itself including test data. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE