[SI-LIST] Re: characteric impedance
- From: Robin <first_hangb@xxxxxxx>
- To: long.0.yang@xxxxxxxxx
- Date: Thu, 6 Dec 2012 12:29:37 +0800 (CST)
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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>
>
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