Electronics > Beginners
Understanding gerber files - simple question
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Siwastaja:
Using an online impedance calculator gets you quite far:
https://www.eeweb.com/tools/microstrip-impedance

Put the numbers in and you'll see the problem with the 2 layer design.

Note that if you order 4-layer prototypes, you need to carefully check the manufacturer's website for the actual stack-up, to get the actual number for the layer separation. It can be as low as 0.1mm, or as much as 0.25mm. This affects the required trace width.

It's still not perfect; for really accurate impedance, you need to pay extra for impedance controlled PCB manufacturing (meaning more precise process control, so you get accurate track widths).
FriedMule:
Thank you a lot! Do you know where I can order boards of the Rogers high frequency with prepreg material type?
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