Re: LNA 's gain
Added after 1 minutes:
Hi,
At such a high frequency your parasitics will be very critical (Bond wire parasitics, Package parasitics, board parasitics) include these parasitics into your layout and resimulate it, definitly you will see the difference.
Check for your device source to ground inductance which is an imporatant killing factor to reduce your gain and I am very sure please check for it. It should be very short and wide enough, so that the inductance will be less
Let me know if this will help......
dipak................