Hello
Here is my circuit that I want to calculate minimum Si
Here is book calculations
\( NF_{act}=1+(NF_{stan}-1)(\frac{T_{0}}{T_{s}})=1+(6.3-1)(\frac{290}{2000})=1.769 \)
\( NF_{act}=\frac{(S/N)i}{(S/N)o}=>S_{i}=N_{i}+NF_{act}+(S/N)_{o} , N_{i}=10Log(K(Ts)Bw) \)
my problem is that why did the writer calculate NF @Ts=2000 because the receiver is not at the Ts=2000 and we calculate Ts for input noise.Am I right?
and if we should calculate NF system for input antenna temperature what should we do for this system? how can calculate NF(act)
In addition , Could you introduce me a good reference with a lot examples in NF and its calculation with their solutions to improve myself in NF?
Thanks in advance
Here is my circuit that I want to calculate minimum Si
Here is book calculations
\( NF_{act}=1+(NF_{stan}-1)(\frac{T_{0}}{T_{s}})=1+(6.3-1)(\frac{290}{2000})=1.769 \)
\( NF_{act}=\frac{(S/N)i}{(S/N)o}=>S_{i}=N_{i}+NF_{act}+(S/N)_{o} , N_{i}=10Log(K(Ts)Bw) \)
my problem is that why did the writer calculate NF @Ts=2000 because the receiver is not at the Ts=2000 and we calculate Ts for input noise.Am I right?
and if we should calculate NF system for input antenna temperature what should we do for this system? how can calculate NF(act)
In addition , Could you introduce me a good reference with a lot examples in NF and its calculation with their solutions to improve myself in NF?
Thanks in advance
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