DESIGN OF A MOLECULAR AMPLIFIER GROUP.
Rept. for Apr 59-Jul 61,
AIRBORNE INSTRUMENTS LAB DEER PARK N Y
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The object of the work was to design, construct, and test a Molecular Amplifier Group for low-noise amplification in the 2150 to 2350 Mc band that would be capable of field operation. The Molecular Amplifier Group consists of a traveling-wave amplifier and sufficient support equipment to provide nominal gains of 30 db with bandwidths of 22 Mc across the tuning range from 2150 to 2350 Mc. The effective noise temperature over the band is about 10K. The operating characteristics were obtained with a 6-12 inch length of 0.065-percent chromium-doped ruby crystal at a bath temperature of 1.8K. Ferrite disks of yttrium iron garnet are incorporated in the traveling-wave maser structure to provide sufficient reverse loss for short-circuit stability. The measured long-term stability is plus or minus 0.2 db the short-term stability is less than plus or minus 0.05 db. Author
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