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a few basic questions about hfss

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oahsen

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hfss jsurf

Hi, I have trying to make a very simple simulation on hfss but I have very little idea how to do it. I installed the program and I go through the getting started example named "antenna", however, it hadn't much helped me.

What I have been trying to do is placing a inductor to the end of a 80cm wire and placing another 2cm wire to another end of the inductor and connect this 2 cm wire to a electrode (by electrode I mean a cylindrical shell basicall)

My questions are the following;
1-) To make a wire should I use "draw->cylinder" and draw a cylinder with 80cm length and small radius or "draw->line" would do the job? (if so how can i adjust the radius of that line)
2-)How exactly can I connect an inductor to this wire? I tried to add a 1cm wire to the end of my initial 80cm wire, and right clicked to it and from "assign boundary" I choosed Lumped RLC. Is this way correct?
3-)I guess the outside structure is air or space or something another. But I want a lossy medium whose specs(conductivity and permeability) are known. How can I do that? I tried to make a very huge square box outside the figures and filled it with that lossy medium, is it correct or does there exist an easier way?
4-)After I run the program how can I obtain the graph which shows the current distribution on the wires?I tried "Hffs-results-create report" but I couldn't find how to obtain a current graph?

If you could answer these question I will be very glad. Thnks in advance.
 

jvol jsurf hfss

1 - For a wire, draw a cylinder, and specify a radius. You can also use a rectangular sheet.
2 - For the boundary, create a flat square at the location of your inductor. make it as small as possible, and assign boundary (Lumped RLC)
3 - make your box or radiation boundary, change the material to your medium. after that, change boundary to radiation boundary.
4 - Current distribution - not sure about this, but you may have to use the field calculator.
 

    oahsen

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Thanks. first 3 questions are solved. However, has anybody any idea about the last question? Because it is very important for me to look to the currents on the wire. How can I use the field calculator?
 

You could look at surface current plot - I believe it is called Jsurf.
Using the field calculator requires quite a bit of EM.
 

    oahsen

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With using Jvol and Jsurf command I have been able to see some coloring on my wires. However, I need to see some concrete values. Because I will change the inductor value that I put there and I need to look how the current change on the wire. But it is very hard to see those color differences with bare eye. Is there a way to make a plot(or something like that) of that Jsurf or Jvol values so that I can make my readings?
 

I = ∫J.ds

and i guess the surface can be cross sections of the wires ....
I am not sure about this - i am just giving suggestions on how to go about this!
 

When I go "hfss-results-create report" then there opens a window and there are only "Freq" and "Phase" quantities under the "Variables" category and no other variables under any other category. So, I can only have a freq vs phase graph. There should be a way to add more parameters to this graph but how?
 

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