yefj's latest activity
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Yyefj replied to the thread Implementing Kramers–Kronig causality check on real VNA s-params.Hello Baluncore,what is the proper way to implement Kramers-Kronig on my s-params which has only 10MHz-67GHz? for causality checking.
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Yyefj posted the thread Implementing Kramers–Kronig causality check on real VNA s-params in Electrical Engineering.Hello , Kramers–Kronig need infinite BW but I measure s-params from 0 to 70GHZ. how do you reccomend to deal with the missing data? Thanks.
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Yyefj posted the thread Limitations of the CQMI method to assess causality of s-parameters in Electrical Engineering.Hello , I am frequently using CQMI to see if my s-parameters are casual however I was told the CQMI can give false results. What is the...
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Yyefj replied to the thread Question about s-parameter causality changes on the same PCB.UPDATE: Hello Baluncore ,I was told the following advice the CQMI is not the ultimate authority to test if the tested s-params is...
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Yyefj replied to the thread Question about s-parameter causality changes on the same PCB.Hello Balucore, Very intresting what you said could you please help me with the following so I will see the situation in more detail...
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Yyefj replied to the thread Question about s-parameter causality changes on the same PCB.Hello Balun core, this is very intersting.if I understand correctly then CQMI is doing error vector magnitude on the samples of the...
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Yyefj replied to the thread Question about s-parameter causality changes on the same PCB.How exactly can non stable dielectric constant make the s-params non casual? same thing says Balun core with bad derminations. why...
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Yyefj replied to the thread Question about s-parameter causality changes on the same PCB.Hello Baluncore the 6 inch line is the one giving better causality. both differential lines are 80 ohms and have two SMA on each end as...
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Yyefj posted the thread Question about s-parameter causality changes on the same PCB in Electrical Engineering.Hello , I am measuring two differential lines one is 3 inch the other is 6 inch over a span of 70 GHz. one differential line shows 92%...
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Yyefj replied to the thread Question about causality in s-parameters.Hello , I did PCB tests in "oven" with long cable like 1m long cable , the causality was very bad like 30% instead of 80%. So first of...
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Yyefj replied to the thread Question about causality in s-parameters.Hello sophiecentaur,the main issue is the cables connected to the vnacould be making this causality issue. I am using n2814a cable. How...
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YHello, I am using VNA with ifbw=3KHz span 10MHz to 70GHZ step 10MHz. I am measuring differential lines SDD11 for TDR uding IFFT. If my...
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Yyefj posted the thread Interpreting FEXT NEXT crosstalk pattern into pcb trace geometry in Electrical Engineering.Hello, I have simulated a situation where we have 3 differential lines as shown below. port 1 has no termination so he has to affter...
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Yyefj posted the thread Open circuit resonator not acting according to theory in Electrical Engineering.Hello, I have tried to implement an open circuit microstrip resonator . I got the microstrip resonating at 5Ghz as shown below. However...
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Yyefj replied to the thread Material property comparison based on TDR and delta L.Hello BalunCore 'The impedance is the impedance of the line.the material i think has the same er but different quality.the line...
