[SI-LIST] Re: Estimate ISI with S parameters -- Using TDR to do SDD21 correlation?

  • From: John Lin (林朝煌) <John@xxxxxxxxxxxx>
  • To: "Zhiping Yang (zhiping)" <zhiping@xxxxxxxxx>
  • Date: Tue, 17 May 2005 14:34:27 +0800

Hi Zhiping,
Yes, I think you are right. It just like to build a RLGC models from 
S-parameter matrix. There are a lot of values for R,L,G,C.
However, If not try to construct a complete S2P matrix, but only use S11 
measurement  to prove correct S21  simulation result.  
It may be OK, right?
 
Thanks,
John
-----Original Message-----
From: Zhiping Yang (zhiping) [mailto:zhiping@xxxxxxxxx]
Sent: Tuesday, May 17, 2005 1:14 PM
To: scott@xxxxxxxxxxxxx; John Lin (ªL´Â·×)
Cc: steve weir; si-list@xxxxxxxxxxxxx
Subject: RE: [SI-LIST] Re: Estimate ISI with S parameters -- Using TDR to do 
SDD21 correlation?
 
Hi Scott,
 
I can not agree with your statement that S11 contains all the information that 
you need to characterize a channel.  In order to completely characterize a 
two-port channel, the complete S2P matrix is required.  In the real 
application, it is OK to use TDR (S11) to construct a channel model, but this 
model may not be unique and you may have different S21 for different models.  
It is not difficult to find a simple example to prove it.  Thanks.
 
Best regards,
 
Zhiping
 

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