[SI-LIST] Re: Resonance on the pcb board
- From: DAVID CUTHBERT <telegrapher9@xxxxxxxxx>
- To: John Smith <swagguy18@xxxxxxxxx>
- Date: Fri, 25 Mar 2011 06:26:37 -0600
John,
how did you measure the board? I'm asking because an S11 measurement can be
corrupted by the injection via inductance. And S21 measurement is more
true-to-life.
Dave Cuthbert
On Thu, Mar 24, 2011 at 8:20 PM, John Smith <swagguy18@xxxxxxxxx> wrote:
> Hi, Experts,
> I am new to signal integrity and I have some questions.
> (1) I did some measurements on my pcb board and found resonances around
> 3.5GHz. Can you give me some hints on what causes the resonances?
> (2) Could you please list some typical issues which can cause resonances
> and
> at what frequency range? I know dielectric loss can cause resonance at
> around 25GHz, what about the other effects?
> Thanks in advance.
>
> Regards,
> John
>
>
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