Recent content by yefj

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    Implementing Kramers–Kronig causality check on real VNA s-params

    Hello Baluncore, I want to use python in order to compare the complex part of the s-parameters and the real part of the s-parameters in order to find the equivalent permitivity and permiability. The problem is the my s-params are band limitied . You gave me manuals but is there more pratical...
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    Transforming one PNA s-parameter data into another PNA data

    Hello,calibration is not perfect. I have two PNA's each has differnt cable length,calibration is not perfect and I see a diffence in th s-params when I am testing basic differential threw line. Is there a method where I could to have some matrices which converts one PNA measurement into another...
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    Strategy to color crosstalk source

    Hello Baluncore thank you for your responce, I did show the system simulation shown below. I get common mode and differential mode comapison between the far agressor effect ofdifferential line and the close differential agressor line. few questions? 1. which mode is more dominant in ruining the...
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    Strategy to color crosstalk source

    update: I have a situation as shown below where there are 3 differential lines one is a victim and two agressors. I have one agressor is far away then the other agressor . what is the best way to see the crosstalk between the differential ines. buttom line We have digital data which is getting...
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    Strategy to color crosstalk source

    Hello baluncore , I have intresting phenomena as following. we have three differential lines one victim and two agressors.all of them are terminated at the same end of the line.The cross talk is measured by SDD21 so it crostal from one differential mode to another differential mode. And I get...
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    Strategy to color crosstalk source

    Hello ,given a layout with multilayer traces.On certain trace there is a high distrotion due to cross talk. Is there a strategy to see from where the cross talk is coming from? To color different contributions of the spectrum noise and have indiction the source of it? Is there such a thing? Thanks.
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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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