Technical information:
Central frequency |
21.65 GHz |
Bandwidth |
2.5 GHz |
Bandpass Filter |
20.4 - 22.9 GHz |
Front end amplifier |
îåíô |
Physical temperature |
15 ë |
System noise temperature |
77 ë |
Realized sensitivity
( = 1 s ) |
3.5 më |
Design |
Switching Radiometer |
Operating modes |
Double - beam switching
or Single - beam mode with
a cooled reference |
Polarization |
No |
Feed Horn |
Quasi Scalar |
Calibration |
Noise generator |
Simplified block-diagram of the radiometer
- PF1, PF2 - input feed horns,
- DC1, DC2 - directional couplers,
- S1, S2 - latching circulator switches,
- CI - cooled ferrite isolator,
- GM - p-i-n diode gain modulator,
- BPF - band-pass filter,
- D - square law detector,
- NG1 - noise generator for calibration,
- NG2 - balance noise generator,
- A1- noise power control attenuator,
- LFA - low frequency amplifier.
Interior of the 15 K cryostat:
Cooled front-end of the 1.4 cm radiometer:
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