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    HFSS: ANALASIS ERROR: spiral coil

    hello i'm design to the spiral antenna for WPT coil to find resonance frequency
    i used copper-insulator-copper double layer and validate result OK.
    BUT analyze result is so weird and i couldn't find resonance frequency
    could you help me? i don't know which part problem
    I attached detail coil spec and S11 graph

    -sincerely-

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  2. #2
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    Re: HFSS: ANALASIS ERROR: spiral coil

    I see diagrams of 2 different antenna. One which is cylindrical and the other a spiral.
    Are both of these somehow the same ?



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    Re: HFSS: ANALASIS ERROR: spiral coil

    There is no resonance at 13MHz in such a WPT coil, it is purely inductive. For excitation, use a lumped port. Make sure your underpass doesn't create a short with the spiral on that layer.



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    Re: HFSS: ANALASIS ERROR: spiral coil

    tks for reply.
    it is same double layer spiral copper coil and Shielded by an insulator.
    i think analysis problem has port problem maybe , could you explain more detail?
    is this radiation area fine? it is hard to find problem T.T



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    Re: HFSS: ANALASIS ERROR: spiral coil

    Not clear what you want to achieve. What's the purpose of the double layer?

    Ground directly below the coil will create a short.



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    Re: HFSS: ANALASIS ERROR: spiral coil

    tks for reply.
    i revised port wave port to lumped port, but result is same...
    Could you explain some detail to create underpass doesn't create a short?
    - Sincerely -



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    Re: HFSS: ANALASIS ERROR: spiral coil

    my purpose of the design is to make Magnetic resonance.

    and cause of ground directly below the coil is to avoid validate error.

    when i seperate coil and ground, validate check always error could you explain more detail???

    -BEST REGARD-



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    Re: HFSS: ANALASIS ERROR: spiral coil

    Understand the physics of your design, understand current flow in conductors and port.



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    hfss: copper spiral antenna modeling problem

    dear all,

    hello, i'm designing the copper spiral coil and find resonance frequency by using HFSS
    i located ground and port, and radiation
    but analysis doesn't work well and graph is so weird.
    could you help me what's problem?
    i attached .hfss for reference

    -best regard-
    Last edited by andre_teprom; 19th May 2019 at 16:52. Reason: New thread merged with the priovious one covering similar subject



  10. #10
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    Re: HFSS: ANALASIS ERROR: spiral coil

    thank for reply. i change the one layer copper coil and use lumped port. also i change to undercut and connect two port . one port is connected to the ground and the other connected to the copper to avoid short.
    but simulation occurs "port refinement, process hf3d error: port 2 does not have a solved inside material on either side." errors.
    could give me some advice?
    i attached .hfss file for the reference to the my thread.
    thank you

    -best regard-



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