K- band Focal Plane Array. K band History. Science workshop determined efficiency improvements necessary for K Band: weather, observing requests, mapping programs.
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Focal Plane Array
GBT Aperture Spacing
Existing Cryogenic LNA Design
Noise Temperature: 36 K max 18-26.5 GHz, 25 K over 75% of band
P1dB Headroom: 30 dB when Tant = 300 K
Frequency Range: 18-26.5 GHz (17-27.5 GHz goal)
Two downconverters are needed to implement the IF multiplexing scheme.
The second downconverter simply omits the latter mixing stage.