Impedance adaptation ethernet tranceiver

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hello i try to adapt at 100 Ohm in even for ethernet to tranceiver. ANd i miss understand calculator, my best try it’s this. But i’m not sur . What is a standart for this ? Zd at 100 Ohm or Zeven att 50 Ohm ? Can you explain Z even Zodd Z diff and Angl_I please thanks

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Ethernet is a differential balanced signal, so Odd mode

You need a much higher value of H to get 100 Ohms

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Thanks, if i change for this without change H but i have 50 Zodd and not Zeven because it’s odd and not even if i understand correctly. I find a Zdiif at 100 Ohm then It’s ok ? Or change H is musted ?

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This looks OK, just avoid even thinner dielectric or W gets very thin and hard to control in manufacturing

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Worth noting that Z_Diff, which most datasheets use, is defined as 2 * Z_Odd…