KiCad

  1. Bug #1848917
  2. Comment #8

Comment 8 for bug 1848917

Revision history for this message
Mishka (mike-volokhov) wrote : Re: Coplanar waveguide calculator precision

@Seth, to be honest I don't know is PCB Calc does it wrong. But please note, the AppCAD shows is even further (I've attached screenshot for spacing calculation).

Such, for polyimide substrate 0.065 mm thick, 0.035 mm copper, 0.17 mm feed line, calculated top copper spacing values:

- AppCAD: 0.25 mm
- WCalc: 0.54 mm
- KiCad: 2.19 mm

Taking in account so huge difference it would be nice to know for sure which one is wrong. Perhaps factory impedance control could answer it.