[SI-LIST] Re: Multi-transmission line Zo
- From: Istvan Novak <istvan.novak@xxxxxxx>
- To: Jennifer Maharani <jennifer.maharani@xxxxxxxxx>
- Date: Wed, 28 Jan 2009 09:26:40 -0500
Hi Jenni,
One way of doing it is to renormalize the S matrix to different
normalization impedances and watch which values minimize frequency
curves of the main diagonal elements. For instance, the normalization
impedance that minimizes S22 is the approximate characteristic
impedance of line 2.
As it was recently dicussed on this list multiple times, dont expect any
(real and frequency independent) normalization impedance to actually
drive the reflection parameters all the way down to zero. Anything that
below 1GHz gives you quarter-wave peak values better than -30dB is
usually considered good match.
Regards,
Istvan Novak
SUN Microsystems
Jennifer Maharani wrote:
> Hi all,
>
> I have S-par of multi-line microstrip. How can I derive the single-
> ended characteristic impedance of each line?
>
> Jenni
>
>
>
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