ABSTRACT
In an RF receiver, one of the most important features is its noise characteristics; that is, the attribute of
collecting the desired input signal while producing less noise. The noise factor F and noise figure NF are
the parameters that measure the noise characteristics of RF receivers,
F ¼ SNin SNout
, (9:3:1)
NF ¼ 10 log10 (F), (9 :3:2)
where SNin and SNout are the signal-to-noise ratios at the input and output of the amplifier, respectively.
