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abc123
Joined: 28 Mar 2002
Posts: 50
Helped: 2
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 30 Aug 2008 6:23 Broadband antenna design, 500MHz - 3GHz need info |
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| I am trying to find info on the design of Broadband antenna 500MHz-3GHz , with FR4 PCB (just like the one sold on the Ebay, the log periodic PCB antenna) any design info? how to calculate the size of each elements? or any existing example?
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Azulykit
Joined: 18 Feb 2007
Posts: 795
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Location: All over the Map.
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| 31 Aug 2008 5:02 Re: Broadband antenna design, 500MHz - 3GHz need info |
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I find "Log Periodic Antenna Design Handbook" Carl E Smith 1966 to be particularly helpful.
A LPD operating from 500 Mhz to 3 GHz souldn't be too hard in FR4. I would expect the base to be a little more than a foot wide and depending on the gain you wand it would be a couple of feet long. A feed of 0.141 semi rigid coax would probably be a good starting point. I have not seen "the one on eBAY".
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abc123
Joined: 28 Mar 2002
Posts: 50
Helped: 2
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| 01 Sep 2008 16:36 Re: Broadband antenna design, 500MHz - 3GHz need info |
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http://cgi.ebay.com/900-2600-MHz-PCB-Log-Periodic-Antenna_W0QQitemZ300244837531QQihZ020QQcategoryZ4672QQcmdZViewItemQQ_trksidZp1742.m153.l1262
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Azulykit
Joined: 18 Feb 2007
Posts: 795
Helped: 100
Location: All over the Map.
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| 02 Sep 2008 17:04 Re: Broadband antenna design, 500MHz - 3GHz need info |
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I saw the antennas you referenced on eBAY. If you want to design one use the reference material above.
I would not use their feed with a connector at the apex of the LPD. That has to corrupt the pattern. I don't know your application and this may be just fine.
Or you could just purchase a PCB and go from there. Then good luck.
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