As you can see here to calculators I found show huge difference or didn't I set it up correctly? I didn't found hints on possible validity limits. Can someone say if one of those given out results is correct? I mean a mismatch of 18 ohm is a no go... Both freeware, is there a commercial software with higher quality?

Edit: Added image with changed material, no significant change, as to my knowledge only the dielectric constant is important, which was set to same value in first 2 pictures. Am I missing something? enter image description here

  • 3
    \$\begingroup\$ They are set to different materials, which probably affects the results. \$\endgroup\$
    – user16324
    Feb 20, 2013 at 22:47
  • \$\begingroup\$ As Brian said, make sure all the relevant specs are matched. Otherwise I can tell you that I've used TXLINE and it's very good. I've simulated and created physical boards and the numbers it gives are good. \$\endgroup\$ Feb 20, 2013 at 23:34
  • \$\begingroup\$ @BrianDrummond I changed the material, but in TXLine it seems it is only important what you edit in the dielectric constant field, the "material" tab just saves this numbers for a few materials \$\endgroup\$
    – James Last
    Feb 20, 2013 at 23:48
  • \$\begingroup\$ @BrianDrummond I dont know why ur comment gets more upvotes, I changed the material and it didnt improve, what am I missing? Can you explain, thanks! \$\endgroup\$
    – James Last
    Feb 21, 2013 at 12:50
  • \$\begingroup\$ Keep in mind this : electronics.stackexchange.com/questions/48867/… \$\endgroup\$
    – Blup1980
    Feb 21, 2013 at 15:04


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