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Heikoo
Joined: 06 Nov 2008
Posts: 14
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 11 Feb 2009 16:28 HFSS boundary, wave port conditions for antenna with feed |
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Hello everybody,
I have an antenna with a feed-line where I have as an excitation a wave port. There are two possibilities to place the air box. You can create the wave port in the same plane as the radiation box or the box is λ/4 far away from the beginning of the feed line where a wave port is placed. So what is the simulation rule?
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Ivan_
Joined: 16 Nov 2007
Posts: 111
Helped: 21
Location: ITALY
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12 Feb 2009 21:26 Re: HFSS boundary, wave port conditions for antenna with fee |
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Heikoo,
if u upload your file I could better understand ur problem and I can try to fix it.
I.
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12 Feb 2009 21:26 Ads |
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Heikoo
Joined: 06 Nov 2008
Posts: 14
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13 Feb 2009 17:08 Re: HFSS boundary, wave port conditions for antenna with fee |
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Ok., I have added an file with the two possibilities.
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Ivan_
Joined: 16 Nov 2007
Posts: 111
Helped: 21
Location: ITALY
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13 Feb 2009 17:30 Re: HFSS boundary, wave port conditions for antenna with fee |
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ok,
1st possibility: the wave port is inside the airbox. The simulation rule is to draw a very thin PEC brick and assign the port to the PEC brick face touching the antenna (looks to be fed with a cpw, isn't it?). PEC is a 'non-solve inside' material in HFSS. Waveports must be placed between a 'non-solve inside' (no meshed) and a 'solve inside' material (meshed like dielectrics, etc.). This solution is typically used when there's a special need to use waveports as so called 'internal ports';
2nd possibility: draw a rectangular sheet touching the airbox and assign the waveport. This is the most common way to use waveport, simpler to be drawn. I think this better suits ur needs, actually there's no need to put the waveport inside the airbox in ur case.
The two situations are, anyway, equivalent.
I.
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Heikoo
Joined: 06 Nov 2008
Posts: 14
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13 Feb 2009 19:11 Re: HFSS boundary, wave port conditions for antenna with fee |
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Thank you.
I am still working 2nd method.
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