[SI-LIST] Re: characteric impedance
- From: "Traa, Boris" <boris.traa@xxxxxxxxxxx>
- To: "first_hangb@xxxxxxx" <first_hangb@xxxxxxx>, "long.0.yang@xxxxxxxxx" <long.0.yang@xxxxxxxxx>
- Date: Thu, 6 Dec 2012 08:20:05 +0000
Deriving the characteristic impedance from the reflection is comparable to the
TDR measurement.
Kind regards
Boris Traa
System design engineer EMC
It's the currents that make circuits work or fail.
Philips Innovation Services/EMC center
Room 2.020
High Tech Campus 26
5656AE Eindhoven, The Netherlands
Tel: ++ 31 40 27 43766
Fax: ++ 31 40 27 42224
E-mail: boris.traa@xxxxxxxxxxx
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On
Behalf Of Robin
Sent: Thursday 6 December 2012 5:30 AM
To: long.0.yang@xxxxxxxxx
Cc: tonywai34@xxxxxxxxx; si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: characteric impedance
Hi Long and Tony, Z-parameter is related to totalself and total mutual
impedance, which is different to characteristic impedance.I suggest to perform
TDR analysis to obtain the characteristic impedance.
Thanks,
Robin Han
At 2012-12-05 01:26:29,"Long Yang" <long.0.yang@xxxxxxxxx> wrote:
>Does it work to use the conversion between Z-parameter and S-parameter?
>I doubt...
>S-parameter is a behavioral model. You can not recognize what the
>S-parameter stand for, transmission line, or waveguide, or something
>else//// Here is my thought, point out if something wrong.
>If you are very sure that this S-parameter is for one dimension
>non-ideal (or ideal) TEM-dominant transmission line, in the other words
>uniform transmission line, then this S-parameter is kind of equivalent
>to W-element, the characteristic impedance is ready to solve. And I do
>think S2Z or Z2S conversion can be directly used to estimated Zc,
>though they can be used to do.
>
>By the definition of S-parameter, reflection is zero when the reference
>impedance is matched characteristic impedance, so we can derive the
>formula of S2S conversion, and sweep Zc to see when reflection tends to zero.
>
>thanks
>Long
>
>On Tue, Dec 4, 2012 at 8:23 PM, Zhang Tony <tonywai34@xxxxxxxxx> wrote:
>
>> Hi
>> If I got a s-parameter file, how can I calculate its characteric
>> impedance at some frequency range?
>> is there any tools can help on this?
>> thanks
>> tony
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