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A Maser Amplifier for Radio Astronomy at X-Band

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4 Author(s)
Giordmaine, J.A. ; Dept of Phys., Columbia University ; Alsop, L.E. ; Mayer, C.H. ; Townes, C.H.

The design and operating characteristics of a maser radiometer for use in radio astronomy at 3-cm wavelength are discussed. The operating system which is described has a bandwidth of 5.5 mc and an input noise temperature, including background radiation into the antenna, of about 85°K. An rms fluctuation level of about 0.04°K is attained using an averaging time of 5 seconds. A discussion of the factors determining the sensitivity of such devices is presented.

Published in:

Proceedings of the IRE  (Volume:47 ,  Issue: 6 )

Date of Publication:

June 1959

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