22 GHz

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Type Criogenic
Dual-Feed
Channels 4
Polarization LHC-RHC
Central frequency (GHz) 22.3
Noise temperature (K) 20÷30
Useful RF band (GHz) 18÷26.5
RF filter width (MHz) 2300
IF filter width (MHz) 2000
Instantaneous RF band (GHz) Tunable
LO1 frequency (GHz) 12-18.5
LO2 frequency (GHz) 5.9
1st conversion IF (GHz) USB
5.85÷8.15
2nd conversion IF (GHz) USB
0.1÷2.1


Main parameters describing the K-band dual-feed receiver

In order to make the second conversion band correspond to a different RF band (sky frequency range), it is necessary to set the LO1 frequancy using the formula: freq(OL1) = RF - 6
Where RF is the lowest frequency of the wanted band (to have the maximum frequency sum 2 GHz).


Vista da sopra del dual feed banda KVista da sotto del dual feed banda K

Picture from above (left) and below (right) of the K-band dual-feed receiver






Scheme of the K-band dual-feed receiver (click on the image for high-res version)

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