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Recent content by abuzaid10

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    [SOLVED] 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] 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. http://anlage.umd.edu/HFSSv10UserGuide.pdf I am attaching the S11 response which is negative now but...
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    [SOLVED] 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 gives me 0 for all frequencies. Could you please give me any hints or suggestions to fix it. Thank...
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    [SOLVED] 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.
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    [SOLVED] 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: Half-mode:
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    [SOLVED] 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. Next, S-parameters for the HMSIW My main problem is that when I simulated these two structures without the tapered microstrip feedlines, the...
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    [SOLVED] Half-mode SIW Simulation

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    [SOLVED] 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 wall. I tried to draw a vertical rectangle there and define it as "perfect H" and "symmetry perfect...
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    [SOLVED] Half-mode SIW Simulation

    Thanks for your answers! Please see two images of the structure Could you please tell me how to do it? Thank you for your help!
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    [SOLVED] 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 they have very close responses. Any idea how should I simulate the half-mode structure? Thank you for...
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    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 will use "Zpi" under the characteristic impedance (Zo) column or maybe "Zwave")? should it be...
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    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 I should use "Zwave" for the characteristic impedance (Zo) in the wave port excitation after...
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    [SOLVED] 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? I know how to put a non model object using "Modeler >> New object type", but I want to assign the...
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    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
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    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?
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