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Old Jan 09, 2010, 06:19 PM
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Joined Aug 2009
126 Posts
Question
DIY Biquad antenna for a 900mHz

I whant to build a 900 mHz patch tx antenna. I looked in some web pages and i found a biquad antenna for 24gHz.
Can someone please help me with the diamentions for a 900Mgz Biquad antenna for i cant find it......

Here is the diamentions for the 24mHz antenna.

http://martybugs.net/wireless/biquad/double.cgi

Thanx
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Old Jan 10, 2010, 03:57 AM
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Romania, Dolj, Craiova
Joined Sep 2007
14,960 Posts
Multiply everything with 24xx/910
Replace xx with a value you consider as being the middle of 2.4Ghz spectrum. maybe it is specified in the original page.
Warning: the result will be *big* ! I would go with the simple biquad or GP patch instead.
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Old Jan 10, 2010, 04:24 AM
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Northwest Arkansas
Joined Sep 2008
617 Posts
http://www.wikarekare.org/Antenna/biquad.html

But I'd recommend a bicircle - slightly smaller and higher gain -

http://www.wikarekare.org/Antenna/bicircle.html
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Old Jan 10, 2010, 11:41 AM
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Budapest
Joined Jul 2003
2,578 Posts
That 14dBi is most probably a mistake. I bet it's below 10 dBi.
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Old Jan 14, 2010, 03:36 AM
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Hey, thanks for the reply.
I think i will try the simple biquad first.
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Old Jan 14, 2010, 03:37 AM
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mmormota

yep, could be
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