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Title: X-Band Ultra-Low Noise Maser Amplifier Performance
Authors: Glass, G.
Johnson, D.
Ortiz, G.
Issue Date: 16-May-1993
Citation: Honolulu, Hawaii, USA
Abstract: Noise temperature measurements of an 8440 MHz ultra-low noise maser amplifier (ULNA) have been performed at sub-atmospheric, liquid helium temperatures. The traveling wave maser operated while immersed in a liquid helium bath. The lowest input noise temperature measured was 1.23 plus or minus 0.16 K at a physical temperature of 1.60 kelvin. At this physical temperature the observed gain per unit length of ruby was 4.6 dB/cm, and the amplifier had a 3 dB-bandwidth of 76 MHz.
Appears in Collections:JPL TRS 1992+

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