Re: Folded cascode LNA
When you designed the LNA did you include all the parasitic elements: Bond wire inductance, bonding pad capacitance, junction capacitance?
At this frequency 2.14 GHz I assume you are using the bond wires for inductance. You cannot change much because your chip is fabricated, but you are very close to the frequency you need. You can adjust the length of the bond wires to adjust the inductance.
The S11 is sensitive to the source inductance and it is a smallish value. Sometimes you have to parallel several bond wires to tweak the source inductor.
You should be thinking about noise figure also. Adjusting the source inductor will change NF also.
If you are using gain peaking on the output, you can adjust the length of the bond wire between the drain and supply to shift around the peak of S21 frequency.
I suggest you run some simulations of various adjustments to the bond wire lengths.