NF LNA design
NF LNA design
(OP)
Hi,
I would like to know how can I know what is the optimum impedance for the BFG520 transistor at any frequency to achieve the best noise figure value. The datasheet gives two noise circle plots at 900 and 2GHz but I need to design it for FM band.
Thanks a lot.
I would like to know how can I know what is the optimum impedance for the BFG520 transistor at any frequency to achieve the best noise figure value. The datasheet gives two noise circle plots at 900 and 2GHz but I need to design it for FM band.
Thanks a lot.
RE: NF LNA design
RE: NF LNA design
Thanks,
RE: NF LNA design
Other than that I would think you have to perform your own characterisation. I doubt there is a magic formula that allows you to extrapolate the optimum noise figure impedances.
RE: NF LNA design
The point is you don't have to hit it spot-on to get a good 1.5dB noise figure. Of course if you are desperate for those last few tenths of a dB you will have to do more hand tuning.