RE: [SI-LIST] : Antenna Problem on the Board

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From: Issa, Elie (Elie.Issa@compaq.com)
Date: Wed May 23 2001 - 09:19:22 PDT


Ok, Can you share or post the materials?

-----Original Message-----
From: Khanh Le [mailto:bastilles@yahoo.com]
Sent: Wednesday, May 23, 2001 8:00 AM
To: Sunil Kumar; subramanya C K
Cc: Si-List
Subject: Re: [SI-LIST] : Antenna Problem on the Board

 Right angled traces do not have any effects at all. I have some materials
that can prove it.

Khanh

 

 

  Sunil Kumar <sunilb@cdotb.ernet.in> wrote:

Hello Subramanya

As the bandwidth of a digital signal depends on it's rise time
(roughly given by 0.35/rise_time), the radiation/transmission line effect
depend on the rise time.

Sunil

On Wed, 23 May 2001, subramanya C K wrote:

> Hello SI Gurus,
> I have a basic question here. We all know that "Right angled traces are
never used on PCBs" as the
> act as antennas (better antennas than the curved traces). In an article I
read that this radiation
> is due not to the frequency of the signal , but to it's rise time. Could
someone please explain me
> this theory ?
>
>
> Thanks and Regards,
> Subramanya C K
>
>

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