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on1
Joined: 27 May 2008
Posts: 42
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 28 May 2008 23:01 plastic material HFSS |
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Hi to all. I'm simulating a monopole for an GSM/GPRS/EDGE/UMTS/HSPA application but i have a problem. The monopole is located on a plastic support (thickness=1mm) 3mm over FR4 substrate. (See image for details). Does anyone know which type of material I have to use for plastic support? And does anyone know ho to determinate the effective index used to calculate the length of the monopole?
Thanks
Bye
Francesco
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Azulykit
Joined: 18 Feb 2007
Posts: 851
Helped: 103
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29 May 2008 2:29 Re: plastic material HFSS |
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| Since you are working on a monopole a very thin dielectric may work well as a support while still remaining transparent to the RF signal.
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on1
Joined: 27 May 2008
Posts: 42
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29 May 2008 21:29 Re: plastic material HFSS |
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thanks for your answer, but the problem is that I have to analyze a just manifactured antenna for a GSM/GPRS/EDGE/UMTS modem. I know that the antenna has some problems and I'm tryin' to simulate 'cause I want to make some improvement on. The antenna is located over a plastic support, the there is 3mm of air and then based on a FR4 substrate: how can I reproduce plastic (think PVC) in HFSS material?
thanks
Francesc
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Azulykit
Joined: 18 Feb 2007
Posts: 851
Helped: 103
Location: All over the Map.
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29 May 2008 23:20 Re: plastic material HFSS |
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| look up the dielectric constant for PVC and add that to your model.
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