AnsweredAssumed Answered

Distributed Amplifier in ADS

Question asked by poornanop on Jul 6, 2013
Latest reply on Jul 13, 2013 by sibu
Hi All,
I've got really confused with this...
I've designed a distributed amplifier with following data using N-MOS (L=0.18um and W=10um) :
fc = 12 GHz , Z0= 50

Then simulate the circuit in ADS , It's cut-off frequency works properly but It's Gain is 0 until 12 GHz!
I've attached two pictures :
1- The schematic of the circuit in ADS
2- The S31 ( means gain, because port 1 is input and port 3 is output)
I've attached the ADS project as well .

Anyone have any experience about distributed amplifier and this problem?