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length of transmission line in ADS for Z0 modeling

Question asked by sanjeegu on Nov 11, 2008
Latest reply on Dec 9, 2008 by rea
I want to model a microstrip/stripline in ADS to find characteristic impedance using s-parameter simulation. I dont want to use LineCalc...
I am using multilayer models and give sweep of all parameters(dielectric constant, trace width, height, thickness etc..) and plot Z0 vs impact of each parameter..
my problem is what should be length of transmission line in simulaiton?  do i need to keep it quarter-wave or any length will do..
i just need to find mag(s11) and use formula (ZL-Z0)/(ZL+Z0). please correct me, if I am wrong..