Comment 17 for bug 1802222

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Nabeel Ahmad (nbl14) wrote :

@Heitor

Thank you for the feedback.

I have studied the relevant section in the book you have mentioned. It can be implemented without any problem. However, I have a few questions about it.
1. In equation 7.6 in the book, epsilon_r is defined as "relative electric permeability". Is it the same as relative permittivity[1]? Can we use this term to avoid confusion with magnetic permeability?
2. Can we use a fixed value of epsilon_r (4.7 for FR-4), or should it be a user input?
3. In equation 7.6, can T (thickness of PCB) be different from via length?
4. Should we implement equations 7.8 and 7.11?

[1]: https://en.wikipedia.org/wiki/Relative_permittivity