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Type: Posts; User: abuzaid10

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  1. Replies
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    [SOLVED]Closed: Re: Simulation of CPW Patch Antenna using HFSS

    Thank you very much vfone.


    I see. Thanks a lot for clarification.
    I think this means the feedlines are not designed correctly to match the 50 Ohms connectors, correct?
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    [SOLVED]Closed: Re: Simulation of CPW Patch Antenna using HFSS

    Hi PlanarMetamaterials,

    Thank you very much.
    I followed the steps in HFSS manual (link is below), pages 270 - 271, to implement the lumped port. This example about CPW Fed Bowtie Antenna....
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    [SOLVED]Closed: Simulation of CPW Patch Antenna using HFSS

    I am trying to simulate a CPW antenna using HFSS. It has a resonance at 2.45 GHz but for some reason, S11 is positive at most of the frequency range!
    The attached response is plotted using Zpi. Zpv...
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    [SOLVED]Closed: Re: Half-mode SIW Simulation

    Thank you very much for your help.

    Please find attached the HFSS files of the half-mode and full-mode structures.
    156412
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    [SOLVED]Closed: Re: Half-mode SIW Simulation

    Thank you for your reply.
    Here is the structures and S-parameters as well as to beta (which shows the cut-off frequency) of the Half-mode and full-mode structures.

    Full-mode:
    156403 ...
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    [SOLVED]Closed: Re: Half-mode SIW Simulation

    Thank you for your feedback.
    Here are the S-parameters of the full-mode SIW (calculated at 50 ohms port impedance) using two different tapered widths.
    156385

    Next, S-parameters for the HMSIW...
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    [SOLVED]Closed: Re: Half-mode SIW Simulation

    156381
    156382



    156383
    156384
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    [SOLVED]Closed: Re: Half-mode SIW Simulation

    This wall is the substrate, no conductor here except at the bottom of the wall, there is a bottom horizontal ground (which is a conductor).


    I didn't define any boundaries or excitations to this...
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    [SOLVED]Closed: Re: Half-mode SIW Simulation

    Thanks for your answers!
    Please see two images of the structure

    156349
    156350



    Could you please tell me how to do it?
    Thank you for your help!
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    [SOLVED]Closed: Half-mode SIW Simulation

    Hello,

    I am having a problem on simulating a half-mode SIW in HFSS.
    Since we cut the width by half, the resulting structure has cut-off frequency double the original one.
    But all papers said...
  11. Closed: Simulation of substrate integrated waveguide

    Hi all
    I want to simulate a substrate integrated waveguide (SIW) with and without microstrip taper to get the same results. What is the correct size of the waveport excitation for the SIW (I guess I...
  12. Closed: Excitation of substrate integrated waveguide with taper

    I am simulating a transformer using substrate integrated waveguide. The results are confirmed with an analytical solution using equations and plotted in Matlab. To get the correct results using HFSS...
  13. [SOLVED]Closed: How to assign non modal to an object in HFSS

    After running the simulation, I want to test the effect of some objects in my design, so I want to assign an object each a time to a non model and then run the simulation. How I can do this, please?...
  14. Closed: Re: Input port matching (S11) for N-Way Wilkinson Power Divider

    My design frequency is 6 GHz, I found my mistake, it was in the calculation of the width of the transformer lines.
    Now I got the -15 dB. Thank you
  15. Closed: Input port matching (S11) for N-Way Wilkinson Power Divider

    I designed a 3-Way equal-split Wilkinson Power Divider, but S11 is somewhat large, how can I decrease its value to be -15 dB?
    129267
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    [SOLVED]Closed: Re: 90 Branch Line Coupler using HFSS

    I worked on the three points you mentioned, and also try to simulate using and without meshing, but the plot is almost the same.
    Now it looks much better, but I believe there is error(s), can you...
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    [SOLVED]Closed: Re: 90 Branch Line Coupler using HFSS

    I re-design the coupler using microstrip structure as in the link, which was very useful. Unfortunately, the S-parameters plot was wrong, is there differences in excitation between driven modal and...
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    [SOLVED]Closed: Re: 90 Branch Line Coupler using HFSS

    Thank you PlanarMetamaterials for your reply,
    In fact it is a microstrip coupler, I use FR4_epoxy with relative permittivity of 4.4 . I see the training manual, which gave an example on 180 Ring...
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    [SOLVED]Closed: 90 Branch Line Coupler using HFSS

    Hello Guys,

    I try to simulate 90o branch line coupler using HFSS, the S-parameters plot is totally wrong, any one know what are my mistakes!
    The file is attached.

    Thanks a lot.
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