> > is that it is enough to just miter the corners of a 90degree bend, > > or (better) use two 45 degree bends to transition between a 90 > > degree bend for all but the very highest frequencies. > > Would it be useful to add an optimization that puts rounded corners on > 90s instead of miters? We already have the 45/45 automiter in the > connections menu; adding a quarter-round option might not be that > difficult. We could certainly do one small enough to fit within the > DRC parameters (i.e. if trace/space are 10, a 20 mil radius curve is > almost always OK).
Again, my understanding is that you only need to bevel the elbow of a 90 degree turn, or better use two 45 bends. You don't need to create a round or circular transition. Here's an article about it: http://www.ultracad.com/articles/90deg.pdf I wish I had Howard Johnson's book here, but I don't. It's packed away somewhere. However, I bet he has something illuminating to say about this. Of course, if you want to create a round or semi-circular bend, that's fine. But it doesn't really buy you much. BTW: There are a lot of good SI articles at the ultracad side here: http://www.ultracad.com/article_outline.htm Stuart
