On Mon, Dec 11, 2017 at 7:25 AM, mike.valk@gmail.com mike.valk@gmail.com wrote:
Just a small question. Why not deviate from the 45 degree angle? So you end up with converging lines, instead of the stepped approach?
because the steps are a close approximation to the original 1956 paper which ensures that there is a smooth transition of the impedance.
if you think "microwave guide" and "lamina flow", if you just draw a straight line the signal bounces about and comes straight back at you.
however if you have these specially-arranged steps, it's a bit like a parabolic mirror, the signal bounces in a mathematically very special way that *focusses* the signal onto the (narrower) track, ensuring that it doesn't bounce back at you.
the ideal case would be to have hundreds of steps (not 45 degree ones) and lots of small lines, i'm currently investigating the format of the .ASC files, identifying where the heck you're supposed to put traces.
l.