[SI-LIST] Re: S11 or S21

Istvan, thanks for pointing out my typo.  Yes, the X2Y web site is www.x2y.com.

Best Regards,


Steve.
At 08:39 AM 5/27/2005 -0400, Istvan Novak wrote:
>Hello Vrenda,
>
>Try www.x2y.com
>
>Regards,
>Istvan
>
>
>
>Naren wrote:
>
> >hello steve
> >
> >I unable to find this site www.xy2.com
> >It is jumping to some other site !!!
> >
> >steve weir said:
> >
> >
> >>Vrenda,
> >>
> >>The X2Y web site www.xy2.com has an application note that I wrote for
> >>extracting capacitor parameters.  That method uses S21.
> >>
> >>A couple of points:
> >>
> >>1. The smaller the test board the better to extract the ESL of a raw
> >>capacitor.  A 2x2 board will up to 500MHz or so.
> >>2. The simple single RLC model is overly pessimistic at high
> >>frequency.  See the DesignCon 2005 TK7 proceedings.
> >>
> >>Steve
> >>
> >>At 11:46 AM 5/26/2005 -0700, Virendra wrote:
> >>
> >>
> >>>Hello All,
> >>>I am trying to measure the esl of a ceramic capacitor.
> >>> I have a test board of 2"x 2" for this.  I have SMA
> >>>connectors connected to two sides of the test board.
> >>>Now to extract the esl of the capacitor, is it best to
> >>>measure the S11 or S21.
> >>>Given that S21 gives lesser measurement errors does it
> >>>still make sense to measure S21 when the two
> >>>connectors are 2" apart?
> >>>
> >>>thanks in advance,
> >>>virendra
> >>>
> >>>
> >>>
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