Recent content by yefj

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    Free s-param assesment tool reccomendation

    Hello,When I am measuring S-params in the lab I need to asses the cauality the passivity the reciprosity.The golden starndart is ysing PLTS. Is there an alternative free software which could be an alternative? especially if the causality test uses kramer kroning method. Thanks.
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    IFFT of FEXT crosstalk tells us insights about crosstalk?

    Hello ,I have SDD31 which is fext cross talk.suppose I do the IFFT to this data. What intresting things I could find out about the cross talk? Can I see by the pulse responce the location where most energy travels from victim to aggressor? Thanks.
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    differential line insertion loss behaves very problematic in the oven

    Hello Baluncore,I dont know how its been treated in production but its very intresting. Thank you very much.
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    differential line insertion loss behaves very problematic in the oven

    Hello Baluncore, I think it moisture in the connector or the substrate. Could you please help me with materials on the subject? I put my PCB in the oven for 60C and it fixed the issue likea charm. So something happen to the system that 60C fixed it. Can a sma connetor dielectic have moisture...
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    differential line insertion loss behaves very problematic in the oven

    Hello,I have a differential line connected by 4 ports using 1.85 sma connectors. one differential port on one side and another differential port on the other side.the PCB is placed in an oven ,I expect the temprature cause S21 to be more lossy but instead its getting less lossy. As shown in the...
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    Implementing Kramers–Kronig causality check on real VNA s-params

    Hello baluncore ,I read the manuals especially this one which is closer to what i need. regarding the steps you told me to follow ,how can I understand hilbert transfort causality from finite BW s-params. After step 4 how do I use the Kramer kronig method? Thanks...
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    Implementing Kramers–Kronig causality check on real VNA s-params

    Hello Baluncore,The Kramer Kronig method uses hilbert transform .Why its not mentioned in the manual?
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    Implementing Kramers–Kronig causality check on real VNA s-params

    Hello Baluncore ,I am trying to implement something simple with the kramer kronig method. I have s-param file is there some manual which is more practical? Thanks.
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    Implementing Kramers–Kronig causality check on real VNA s-params

    Hello Baluncore, first I need to do the extrapolation . In the article they say that they use the polinomial but they dont say how they got the polinomial coeffients. Is there a manual that explains better the polinomial extrapolation methedfology in the Kramer -Kronig method?
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    Limitations of the CQMI method to assess causality of s-parameters

    Exacrly What is the formal limitation of the IEEE370 method cqmi? is there some definition where i know not to rely on this method?
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    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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    Implementing Kramers–Kronig causality check on real VNA s-params

    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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    Limitations of the CQMI method to assess causality of s-parameters

    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 cases where I should not rely on CQMi? https://resources.altium.com/p/ieee-p370-standard-high-speed-pcb-interconnects Thanks.
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    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 accurate. Could you please reccomend me a better method to know if my s-params are good or not? Thanks. I would compare the time-domain response (TDR/TDT), inspect...
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    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? 1.Do you have some good CQMI manual which mathematicakly shows how we process the s-params? 2.Could you recommend me basic EM simulation physical of uneven...
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