[ibis-macro] Re: FW: a s2p example for output impedance and reflection
- From: "Muranyi, Arpad" <Arpad_Muranyi@xxxxxxxxxx>
- To: <ibis-macro@xxxxxxxxxxxxx>
- Date: Tue, 14 Dec 2010 13:12:45 -0800
Can you send the files in a different format? I
wasn't able to open them...
Thanks,
Arpad
==================================================
From: ibis-macro-bounce@xxxxxxxxxxxxx
[mailto:ibis-macro-bounce@xxxxxxxxxxxxx] On Behalf Of
fangyi_rao@xxxxxxxxxxx
Sent: Tuesday, December 14, 2010 3:09 PM
To: ibis-macro@xxxxxxxxxxxxx
Subject: [ibis-macro] FW: a s2p example for output impedance and
reflection
Forwarding my analytical analysis shown at today's meeting.
From: RAO,FANGYI (A-USA,ex1)
Sent: Monday, December 13, 2010 4:52 PM
To: Muranyi, Arpad; Walter Katz; Scott McMorrow; Bob Ross; Todd
Westerhoff; Dmitriev-Zdorov, Vladimir; BIERNACKI,RADEK (A-Sonoma,ex1)
Cc: RAO,FANGYI (A-USA,ex1)
Subject: a s2p example for output impedance and reflection
Hi, AMI colleagues;
Following the discussion in the last ATM meeting about S-parameter file
in AMI models, I think it might be helpful to use a simplified s2p
example to facilitate the discussion. Since I dropped out from the
meeting before it ended, I probably miss the conclusion you guys reached
at the end and my analysis here may not be relevant.
In the circuit below the reference impedance of the s2p is Z0 and the
impedance of port 2 termination is Z.
The circuit equations are
Solve for V2 we get
So V2 depends on port 2 impedance Z. When Z=Z0, S22 and S12 disappear in
the solution.
Regards,
Fangyi
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