Re: RF front end
In reality the main goal of the LNA is to have a very low noise figure.
However, as every thing in life you dont get anything without give some
thing in return, it means the gain and stability of the first LNA play an important
role. So, the first LNA would be low noise figure but low gain and the second
moderate noise figure but high gain. An analysis of the chain for noise figure,
stability, gain and intermodulation products is neccesary. Then the whole
"system" of two LNA becomes more like a LNA and a first amplfier.