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Packaged Tunable L-Band Maser System

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2 Author(s)
Arams, F.R. ; Airborne Instruments lab., Cutler-Hammer, Inc., Melville, L.I., N.Y. ; Okwit, S.

A low-noise tunable L-band maser system is described. The maser uses a pink ruby crystal oriented at 90° and is tunable from 850 to 2000 mc. The voltage-gain bandwidth product is as high as 37.5 mc at a liquid helium bath temperature of 1.5°K. An L-band circulator has been developed for use with the maser. It has an insertion loss of 0.3 db, operates over a 200-mc frequency range at L-band, and determines the usable tuning range of the circulator-maser system. The maser and circulator have been packaged into an operational unit that includes all auxiliary components, and has a system noise factor of 0.5 db (35°K). Electrical and mechanical features of the system are described and performance data are given.

Published in:

Proceedings of the IRE  (Volume:48 ,  Issue: 5 )