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Hi,
I’m a new QUCS user with no prior experience with either uSimmics or Qucs-S, and am playing around with both. In a short s-param sim I’m running with some t-lines, with identical (I believe) settings between the two, I’m getting significantly different results and am trying to understand what I might be doing wrong. Any suggestions would be appreciated. I’ve attached screenshots showing the comparisons, and have also thrown up a quick ADS sim as a comparison of a similar structure for good measure; the Quos-S output is the closest to ADS compared to uSimmics.
Cheers.
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Hi Hub !
1. in your uSimmics simulation you have t=0 um in Subst1, change that to some thickness t=35um
2. you have different widths, lenghts and substrate thickness in your simulations, uSimmics vs ADS, 10 mil = 0.254mm, 1000mil = 25.4 mm, 1550mil = 39.37mm
3. In your ADS simulation you have used ML1CTL_C, I think that this is some kind of coupled line model, If I remember the ordinary model is MLIN and MSUB if you wnat to do a comparision with uSimmics.
/H
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Hi!
Thank you so much for the help. The metallization thickness setting helps fix this.
Though, does this mean that there is a possible default thickness being identified in both ADS and QUCS-S but not in uSimmics? If you see the other screenshots, seems like setting t=0 in the others doesn’t cause the same issue.
Thanks!
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