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Recent content by bahramse

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    [moved] DC current excitation of coil in CST

    Hello, I have a coil and I would like to apply the DC current on it and observe the produced magnetic field in CST . I have checked the current port on Low frequency solver, but I dont know the proper way to use it. I would be grateful if anyone can help me on this issue. Thanks
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    [moved] Solving negative inductance solenoid in CST

    Actually I attached the S-parameter in my previous post , we only have a 5 dB drop in 540 MHz and we dont have any drop close to 240 Mhz.
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    [moved] Solving negative inductance solenoid in CST

    Thank you very much for your response Volker, Just the last question , if the self resonance frequency is at 240 MHZ why we dont have drop in S-Parameters at 240 MHz and it is at higher frequency ? thank you again for all your help.
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    [moved] Solving negative inductance solenoid in CST

    For lower frequency we have these results, It is really strange , the peak value is much larger !
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    [moved] Solving negative inductance solenoid in CST

    Actually I use CST post processing to calculate the Inductance , I use Post processing-->S-Parameter-->Coil Parameter-->Inductance. Is there any other way to calculate the Inductance? based on this figure, it looks like resonance frequency but it is very weak. is this the self resonance...
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    [moved] Solving negative inductance solenoid in CST

    I am sorry about that, Actually I checked the model and I couldn't find anything, this is strange that in some special range of frequency this phenomena happens, the attached file is the ohmic resistance and as we see it just has peak in some special frequency not whole the frequency band, what...
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    [moved] Solving negative inductance solenoid in CST

    Sure , the attached files are the Z matrix, the model and the Inductance, Thank you for your help in advance.
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    [moved] Solving negative inductance solenoid in CST

    thank you very much for your response , the gaps are between the turns of the coil, you might be right but when I calculate the capacitance of the coil, it gives me different number. I am trying to say that, if the coil behaves as an capacitor, it should has positive inductance but very small...
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    [moved] Solving negative inductance solenoid in CST

    Hello , I designed a simple solenoid coil in CST and after the simulation it gives me negative value for inductance, I have read some post about this issue and some propose to rotate the coil or something like this which I didnt understand at all. the most interesting part is that the inductance...
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    how can i draw this spiral in cst

    thank you very much for your help i found a translate mode in transform part which solved my problem , i really appreciate
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    how can i draw this spiral in cst

    hi guys could you please help me to draw this challenging spiral ? i really dont know is there any fast way to draw this? thank you very much
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