[SI-LIST] Re: 90 degree turn in PCB tracks

Dear Vishnu;
I was just going through your below mail;
I would like to know more how 90 degree bend will cause less reflection
compared to 45 degree bends practically.

Regards,
Naren



On 7/25/06, Vishnu Mohan <vishyin8@xxxxxxxxx> wrote:
>
> Dear Dhaval,
> To my kowledge 90 degree bends are not recomended because of the acid
> trap.
> Some people says 90 degree bend can cause more reflection than 45 degree,
> but it is not true. At high frequency 90 degrees produce less reflection
> than 45 degree.
>
> Please find the attached document.
>
> With Regards
> Vishnu Mohan
>
> On 7/25/06, jun li <lijun_hit@xxxxxxxxx> wrote:
> >
> > I read a little about this topic. To 90 degree bend, there will be
> overlap
> > area. It behaves as capacitive discontinuity. Moreover, the sharp point
> at
> > the corner will enlarge electrical field.
> >
> >   regards
> >
> >
> > Dhaval Bhodia <bhodia1@xxxxxxxxx> wrote:
> >   Dear Experts
> > I want to know that why PCB tracks can not have
> > 90 degree bend ? second why 45 degree bend is most
> > preferable ? anybody has made any analysis on bending
> > of PCB tracks ? what are the technical issues will
> > come if some one makes 90 degree bend in PCB ? What
> > are electrone and transmission line charasterisic
> > stops to make that 90 degree turn in PCB tracks ?
> > Regards
> > Dhaval
> > __________________________________________________
> >
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> -- Binary/unsupported file stripped by Ecartis --
> -- Type: application/pdf
> -- File: 90deg.pdf
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