Please ignore the attached files. They are somehow created automatically by my Outlook. I can't open them either. All my results are shown in the email text. Thanks, Fangyi From: ibis-macro-bounce@xxxxxxxxxxxxx [mailto:ibis-macro-bounce@xxxxxxxxxxxxx] On Behalf Of Muranyi, Arpad Sent: Tuesday, December 14, 2010 1:13 PM To: ibis-macro@xxxxxxxxxxxxx Subject: [ibis-macro] Re: FW: a s2p example for output impedance and reflection 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. [cid:image001.jpg@01CB9B91.34197D40] The circuit equations are [cid:image002.png@01CB9B91.34197D40] Solve for V2 we get [cid:image003.png@01CB9B91.34197D40] So V2 depends on port 2 impedance Z. When Z=Z0, S22 and S12 disappear in the solution. [cid:image004.png@01CB9B91.34197D40] Regards, Fangyi