Research Article
Analysis and Research on the Centimeter Band Receiver Amplitude Calibration Method
Table 1
Theoretical calculation of noise temperature for the K-band receiver.
| | Frequency (GHz) | Gain (dB) | Ambient T (K) | Noise figure (dB) | Noise T (K) | Efficiency T (K) |
| | Mylar | −0.05 | 295 | 0.050 | 3.4 | 3.4159 | | Feed | −0.2 | 295 | 0.200 | 13.9 | 14.0639 | | OMT | −0.07 | 295 | 0.070 | 4.8 | 5.0774 | | WCC | −0.4 | 295 | 0.400 | 28.5 | 30.6373 | | LNA | 30 | 295 | 3.000 | 293.6 | 346.5450 | | 10 dB | −10 | 295 | 10.000 | 2655.0 | 3.1338 | | Amp | 30 | 295 | 3.000 | 293.6 | 3.4654 | | BPF | −0.7 | 295 | 0.700 | 51.6 | 0.0006 | | 3 dB | −3 | 295 | 3.000 | 293.6 | 0.0041 | | Mixer | −8 | 295 | 8.000 | 1566.3 | 0.0433 | | BPF | −0.5 | 295 | 0.500 | 36.0 | 0.0063 | | Amp | 30 | 295 | 3.000 | 293.6 | 0.0575 |
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