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| Deembedding and reflection coefficient - RF Cafe Forums | ||||||
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Because of the high maintenance needed to monitor and filter spammers from the RF Cafe Forums, I decided that it would
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Below are all of the forum threads, including all the responses to the original posts. RF-Ban Post subject: Deembedding and reflection coefficient Posted: Wed Jan 11, 2006 10:51 am Captain Joined: Sat Feb 26, 2005 5:24 pm Posts: 16 Location: Lille, FRANCE Hello, I am trying to deembed measurements from TDR and i don't see why i can't get the results i want. I explain my problem: I have measured through a VNA the reflection coefficients of 3 standards (S0L), and 3 other components. I made a TDR measurement of those components and standards. From the TDR of the standardsi apply a fft and thanks to the current and voltage i get the measured reflection coefficient of each: a=(V+ZI)/sqrt(Real(Z)); b=(V-ZI)/sqrt(Real(Z)); S11m=b/a; Knowing their true reflection coefficients thanks to the VNA, i compute the error vectors: b=e11; c=e22; a=e21-e11*e22; The problem is that when i use those vectors with TDR of the standards i find back the good s-parameters of the standards, but when i do this with other components i don't find at all. with : S11a=(S11m-b)/(a+c.*S11m); Note : the time span and step, and frequency span and step permits to work one with each other. Can someone help me ? Thank you Posted 11/12/2012 | ||||||
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