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Recent content by aurora9520

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    Looking for a Tx antenna source

    Thanx, vfone. My advisor suggested a wideband antenna, and we need it in more compact size. (tens of mm) I think I can go with a patch UWB antenna. Could anyone suggest me where and how to find one that suits my need? Thanks in advance!
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    Looking for a Tx antenna source

    Dear all, Hi. I need to set up an experiment to test/build a Rx antenna I simulated, but I am not sure what I should use for the generating source? My antenna should focus around 2GHz, but we would also like to test it's performance up to 5GHz. So I am trying to look for a Tx antenna that...
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    Looking for loop antenna model for xFDTD

    Hi. Does anyone have experience using xFDTD to model the loop antenna, and mutual inductance between them? Could you send me your model? This will help a lot! Thank you very much! aurora
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    how do I use the biological materials in xFDTD?

    Hello DrNiiken Thanks for your suggestion! SEMCAD responded very fast, and I am playing around with it. Seems to be pretty nice! Thanks, aurora
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    The width (in air) for Gaussian Pulse

    Dear all, I don't quite get the idea of the Gaussian Pulse. In xFDTD menu, it states that the width in air is suitable at 32 steps, which is also the default. But where did they get that? And how should I decide the pulse width if I am calculating in dielectric, so that wavelength is...
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    How to save the s-parameter results from XFDTD into .txt format to use them in Matlab

    S-paramater XFDTD Hi Aiiar, Just look in the directory of your project, there should be files ending in .S11, .S12, S21, S22 These are the s-parameters. They are just plain ASCII txt that you can simply import into MATLAB aurora
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    how do I use the biological materials in xFDTD?

    Dear all, Does anyone have experience in the head model in xFDTD? Please give some help or any valuable advice where I can get some detailed tutorial? Thank you very much in advance... aurora
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    how do I use the biological materials in xFDTD?

    Dear all, I am trying to use the hi-fidelity package of human head & body from xFDTD. But I don't understand the part on how to set-up the frequency dependent materials for a broadband antenna simulations. This is what I do: 1. Import a mesh-object, e.g. the male head 2. Create antenna...
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    Built-in wire and thin wire in xFDTD

    Thin wire in xFDTD Dear all, What is the wire radius for the built-in wire geometry in xFDTD? What is the difference of choosing this and the "thin wire" in the material list? Thanks in advance for your help! aurora
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    Solving 2D problem w/ xFDTD

    Hi abdoeng, Ideally I want to model a circular loop w/ radius 1mm, but in xFDTD I can only build a square loop w/ size ~1.7mm Separation is 1.5cm, and frequency band in the GHz region From the manual, I think the Gaussian Derivative is what I should use to avoid DC parts? Also, the dielectric...
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    Solving 2D problem w/ xFDTD

    Hi abdoeng and everyone, I tried to setup my model to calculate the S21 between two current loops. Please help me check if I make any mistakes? I am not quite sure if I can model the current loop like this? Thanks so much in advance! aurora
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    Solving 2D problem w/ xFDTD

    Thanks, abdoeng for your reply! Actually I am just trying to model two current loops and their mutual inductances. Also the S parameters. But I don't know how I should model a circular circuit in xFDTD? I will try to upload my design once I figure out how to do it.. I am starting to use...
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    Solving 2D problem w/ xFDTD

    Thanks, abdoeng! Another question, what should I use if I need to simulate a circuit loop? What does it mean if I choose a thin wire to be magnetic? Does it then stand for a magnetic dipole? Thanks so much for your help~~
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    Solving 2D problem w/ xFDTD

    Dear all, Is it possible to solve a 2D problem using xFDTD, e.g. a simple waveguide problem? Since it should be the same along the z direction, I wonder if I can shrink the problem to just a 2D problem? Thanks a lot! aurora
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