vagarwal
Member level 2
gain expansion query
Hi All,
We are observing a peculiar problem with our MMICs. we have designed 3 stage x-band LNAs using pHEMTs, model from a reputed GaAs foundary, simulated on MwOffice. While testing the chips we observed that the overall gain has reduced to the tune of about 4-5 db from that simulated.
Also at a particular P(input), the gain expands and at the peak the gain is the same as simulted. This expansion is not seen in the simulation.
Can someone guide on the possible reasons of the same and the ways to eliminate these problems.
Thanks and regards
Hi All,
We are observing a peculiar problem with our MMICs. we have designed 3 stage x-band LNAs using pHEMTs, model from a reputed GaAs foundary, simulated on MwOffice. While testing the chips we observed that the overall gain has reduced to the tune of about 4-5 db from that simulated.
Also at a particular P(input), the gain expands and at the peak the gain is the same as simulted. This expansion is not seen in the simulation.
Can someone guide on the possible reasons of the same and the ways to eliminate these problems.
Thanks and regards