the wire is not electrically connected to a metalic face

oussama1
oussama1 Altair Community Member
edited October 2020 in Community Q&A

i constructed the cable shown in the attached image. the bare above wire should be electrically connected to the metallic shield. however,  feko does not consider the wire and the shield surface connect even i have union them together. what do you suggest ?  does there is a way to make the wire with a given radius connected to the shield surface taking in consideration the wire radius. (it means the shield surface is far from the wire center by rw (wire radius) as shown in the image).

 

<?xml version="1.0" encoding="UTF-8"?>wire_touch.PNG

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Answers

  • Mel
    Mel Altair Community Member
    edited May 2020

    It's difficult to judge just from an image,

    If the 3 wires running into the Y direction are made from lines (which will mesh into wire segments) then their 'surfaces' (defined by their radii) are purely analytical. You cannot connect to them. 

    If you draw a line going into a cylinder and Union, then there would be a connection to the cylinder surface plus a small remaining section of the line would remain on the inside of the cylinder.

     

  • oussama1
    oussama1 Altair Community Member
    edited May 2020

    thank you so much for your reply.  i have attached a simpler model (parallel not twisted). my purpose is to make the wire electrically connected to the shield, but this cannot be occurred since the wire surface defined by its radii is purely analytical.  you said that if i draw a line going intro a cylinder and union, how ? did you mean the wire should be exactly on the shield surface? (i have tested that, but feko had ignored this wire after meshing). i really i didn't understand your last point. please, can you show me a screen shot.

    thank you in advance.

    Unable to find an attachment - read this blog

  • Mel
    Mel Altair Community Member
    edited May 2020

    I don't understand what you are actually trying to model. Perhaps a hand drawing would help?

  • oussama1
    oussama1 Altair Community Member
    edited May 2020

    this is a cable model and i want to obtain its s-parameters by obtaining the touchstone file. in the real cable. the bare above wire should be electrically connected to the shield. however, in the wire model the wire is not connected to the shield even if i union the shield with the wire. please, what i should do to make the wire electrically connected to the shield?

    also can you explain your expression '

    If you draw a line going into a cylinder and Union, then there would be a connection to the cylinder surface plus a small remaining section of the line would remain on the inside of the cylinder.

    ' by providing an image

  • Mel
    Mel Altair Community Member
    edited May 2020

    <?xml version="1.0" encoding="UTF-8"?>image.png

     

    Unable to find an attachment - read this blog