--- crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68
On Fri, Aug 11, 2017 at 2:56 AM, Andrew Bolin <[email protected]> wrote: >>> Also I'd personally not use curved wriggles. HF signals travel in a >>> straight direction. With curves they start diffracting and start >>> bouncing cross each other and might start to radiate or echo back. >> >> mmmmm.... *stress*! anyone else feel the curves are "Bad"? > > No. You've followed a bunch of very good advice about length matching, > impedance etc. > It looks like you've generally kept the pairs parallel through the curves, > which is great. > > If you have an easy option in your software to switch from 45 degree > corners to smooth curves, I would do it - if there's not, don't worry. i did those by hand using the "accordian" feature >>> If tight for space you can use 90% corners with a chamfered outer >>> edge. I suppose the chamfer acts like a mirror. > > The chamfer is there for impedance reasons, it's not a mirror, and note > that a curve is preferred. > You also run the risk of manufacturing problems by doing the chamfer - > you're already at the minimum trace width, right? yehyeh > As you've previously said, the old layout was further away from best > practices, and *it worked*. but it was done by someone else and it didn't use curves. l _______________________________________________ arm-netbook mailing list [email protected] http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook Send large attachments to [email protected]
