design about Via Hole in ADS.............

[Ferdy88]

Hi,
I am making the layout on microstrip for a design of a medium power amplifier at 2.14 GHz. I have a problem about the use of a via hole to provide the ground at my circuitry.
The via hole leads to a significant reduction in gain from 14 dB to 10 dB.
Is it possible?
I am using ADS and my substrate MSUB has: H = 1.52 mm, Er = 3, Mur = 1,
Cond = 1.0e+50, Hu = 1.0e+036 um, T = 35 um, Tand=0.001, Rough = 0 um.

I want to know what are the most suitable parameters for the via hole and where
to find the theory about the via hole.....

 

[aniltunwal]

thats is good that you are simulating with Vias holes. it will reflect you all the problems before you make the PCB. the most important prarameters for the via is conductivity, height, diameter. you have not taken the realistic conductivity.

the Vias holes are adding an additional inductance to you circuit which is playing the major role in degrading the gain of your amplifier.