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Zangetsu57
Joined: 23 Aug 2007
Posts: 21
Helped: 1
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 27 Sep 2008 19:11 Simulation of a 3x3 antenna array in HFSS |
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Hello everyone,
I am trying to simulate a 3x3 antenna array in HFSS. I am only concerned about the response of the center element, and thus only need 1 wave port. All of the stacked patch antenna elements are fed with a bottom-fed coax probe. Is there a way to ensure a 50 ohm termination on a coaxial probe without inserting a wave port? I want to do this for the other 8 ports that I am not interested in to reduce simulation time. The purpose of placing the surrounding elements is to take into account some mutual coupling effects when tuning the center element.
Alternatively, I could use a periodic boundary condition. The final antenna array is 16 x 11 elements, so I'd imagine that an infinite array is a reasonable approximation. I've Googled around, but am baffled as to how I would implement this. Does anyone have any articles or know of any websites that I could visit to learn how to do this? Note that I am a first year graduate student, so I don't have the years of experience or considerable understanding under my belt as of yet.
Thank you in advance for anyone who can help!
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Zangetsu57
Joined: 23 Aug 2007
Posts: 21
Helped: 1
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| 30 Sep 2008 16:28 Re: Simulation of a 3x3 antenna array in HFSS |
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| Has anyone used a periodic boundary in HFSS for modeling a patch antenna array before?
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friendlyaggie
Joined: 20 Apr 2008
Posts: 1
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| 09 Oct 2008 4:37 Re: Simulation of a 3x3 antenna array in HFSS |
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| Have you considered doing a lumped RLC on the other 8 feeds (50 Ohm resistance)?
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Zangetsu57
Joined: 23 Aug 2007
Posts: 21
Helped: 1
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| 21 Nov 2008 6:04 Re: Simulation of a 3x3 antenna array in HFSS |
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I have, but I can't figure out how to do it properly. As a test, I created a 50 ohm coaxial cable and put a 5 ohm RLC circular resistance at the open end. At the input, I used a waveport. S11 should be at least -40 dB, but it is nowhere near that. I attached the design file (HFSS 11.1.2).
Does adding more waveports simply to use them as 50 ohm loads add to computation time?
Thanks,
Paul
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