I need to transfer 625MHz differential data line between two boards. The idea is that the cheapest and simplest option would be to use pin headers and place them in such way that the differential impedance is close to 100Ω.
Do you have any links for books or online calculators that I could use to calculate the impedance between two wires in free air?
Do you have any links for books or online calculators that I could use to calculate the impedance between two wires in free air?