On Mon, Oct 2, 2017 at 10:33 PM, Luke Kenneth Casson Leighton <[email protected]> wrote:
> On Mon, Oct 2, 2017 at 10:15 PM, Richard Wilbur > <[email protected]> wrote: >> The alternative is to use the "U"-shaped with spacing of at least 20mil >> between facing copper of the same trace. > > yyeah that's 4x track width... it's gonna be really really tight to > get 20 mil in. will see. it was. best i could do (attached) - accordion wasn't having any of it, had to do them by hand. the defaults in PADS for the gap separation btw were set to 2x. 4x seems an _awful_ lot, to my eye: i don't believe i've ever seen wiggles with such large separation. are you sure the app note didn't mean "4x separation centre-to-centre of the traces"? or, was the app note specifically applying to really *really* high frequency traces (above say... 2 or even 3 ghz)? l.
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