Thanks, in the input port I used an isolator, whose pads is 2mm(L)X1.5mm(W), but my 50R trans line is 0.5mm wide, so I guess this will cause trouble. And the dc block capacitor is 0402 package, Murata microwave capacitor, I tested its insertion loss is about 0.1dB.
I will use 64bits ADS to simulate the PCB, bceause I am a newbie on momentum, how to build model for FHX13LG and capacitor in ADS? do you have any training file, tutorials, examples for momentum? does it have any way to directly import Altium PCB into momentum?
thanks.