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KEI
Joined: 14 Oct 2007
Posts: 2
Location: JAPAN
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 03 Feb 2008 8:12 HFSS:Finite-Ground-Coplanar |
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I have to simulate a Finite-Ground-Coplanar structure in HFSS.
Can you help me to define a port ?
The ground lines are very narrow in my model , so the port outline can't intersect side grounds. This is contrary to the tutrial.
How should I define a port? Please help me.
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Azulykit
Joined: 18 Feb 2007
Posts: 708
Helped: 86
Location: All over the Map.
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| 03 Feb 2008 19:57 Re: HFSS:Finite-Ground-Coplanar |
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Without knowing the details of your problem it is hard to give specific recommendations.
On-line help under "impedance calculations" has useful suggestions. CPW lines are mode rich to that can add confusion. About the port size, why not just make the port bigger?
I prefer to use modal solutions and examine the port fields (display port fields) to see if the excitation is as I anticipated.
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peleda
Joined: 10 Jan 2006
Posts: 102
Helped: 20
Location: Monte Carlo
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| 08 Feb 2008 7:27 Re: HFSS:Finite-Ground-Coplanar |
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| use a waveport
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babyface_chz
Joined: 08 Dec 2007
Posts: 2
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| 09 Feb 2008 6:10 Re: HFSS:Finite-Ground-Coplanar |
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Because your ground size is small, you can use the lump port to be setten on a
plane.
Remembering to set the others 2D plane to Perfact E.
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kimx0945
Joined: 01 Jun 2005
Posts: 4
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| 19 Feb 2008 19:47 Re: HFSS:Finite-Ground-Coplanar |
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When the ground width of a CPW is very narrow, the wave port should be modified for the ground plane to touch the edge of the wave port. So, first you draw small 2D rectangles that touch both the ground plane and wave port, and then you need to substrate these rectangles from the original wave ports. Please see the attached file. The figure shows what I want to tell you.
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d04500
Joined: 11 Feb 2006
Posts: 8
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| 26 Feb 2008 3:58 Re: HFSS:Finite-Ground-Coplanar |
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CPW tutorial
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Vigort
Joined: 04 Oct 2007
Posts: 12
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| 26 Feb 2008 8:11 HFSS:Finite-Ground-Coplanar |
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Hello All!
Help me please! How to set port for air coplanar lines without groud? Whether it is necessary to set a layer of air as a dielectric substrate?
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KEI
Joined: 14 Oct 2007
Posts: 2
Location: JAPAN
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| 26 Feb 2008 16:35 HFSS:Finite-Ground-Coplanar |
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Thank you for your helpful replies,in particular kimx0945 and d04500 !
I have understood the meaning of 'fingers'.
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praised63
Joined: 05 Feb 2008
Posts: 4
Location: Islamic Republic of Iran
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| 03 Mar 2008 9:27 Re: HFSS:Finite-Ground-Coplanar |
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| good
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zhangjun
Joined: 01 Apr 2008
Posts: 10
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| 01 Apr 2008 8:35 HFSS:Finite-Ground-Coplanar |
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| thank you
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malkomx
Joined: 07 Apr 2008
Posts: 4
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| 08 Apr 2008 12:54 Re: HFSS:Finite-Ground-Coplanar |
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Hi, I have some HFSS files for CPW, enjoy it.
Added after 3 minutes:
HFSS files
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malkomx
Joined: 07 Apr 2008
Posts: 4
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| 08 Apr 2008 12:59 Re: HFSS:Finite-Ground-Coplanar |
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HFSS File
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anil_21p
Joined: 14 Jul 2005
Posts: 13
Helped: 1
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| 01 May 2008 13:43 HFSS:Finite-Ground-Coplanar |
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| you can use waveport just like it is used in microstrip like structure simulation
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.mandarin
Joined: 01 May 2008
Posts: 3
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| 01 May 2008 23:18 Re: HFSS:Finite-Ground-Coplanar |
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malkomx
Oh, man, thnx for yours files (:
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