Luckyer
Newbie level 3
![Newbie level 3](/styles/images/ranks/alevel3.gif)
Hi all,
I probably have a simple question.
I have to design a circuit with a multilayer substrate which i cannot know his real permitivity nor other parameters but dimensions, I can just use it to my simulations and momentum.
But i need to make a 50 Ohms / 90º microstrip line. After doing the simulations and obtaining the S parameters, how could I obtain Z0 just with S parameters?
I put a 50 Ohm load at the line and made the Z0 = ZL (1-S(1,1))/(1+(S(1,1)) relation with a known line and substrate (W and L for 50 Ohm and 90º), but I can't obtain feasible results (Z0 = 0.2 < 80º)
Thanks !![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
I probably have a simple question.
I have to design a circuit with a multilayer substrate which i cannot know his real permitivity nor other parameters but dimensions, I can just use it to my simulations and momentum.
But i need to make a 50 Ohms / 90º microstrip line. After doing the simulations and obtaining the S parameters, how could I obtain Z0 just with S parameters?
I put a 50 Ohm load at the line and made the Z0 = ZL (1-S(1,1))/(1+(S(1,1)) relation with a known line and substrate (W and L for 50 Ohm and 90º), but I can't obtain feasible results (Z0 = 0.2 < 80º)
Thanks !