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116 posts

Master Geek
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Topic # 89007 24-Aug-2011 20:03
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Sorry if this belongs in another section.

Small and high gain are probably exclusive.
I would settle for just directional.

I am working on a project that could do with a tight 2.4ghz beam. :)

Found these, 30,33dbi
http://www.zdacomm.com/2-4-ghz-gird-parabolic-dish-antenna-high-gain-seires.html
http://www.radiolabs.com/products/antennas/2.4gig/stage6.php

So in theory how tight could a beam be made?
1 Wavelength?

Is there another way to form the beam, say fire it down a tube?
Wave propergation is not my strong point.

Any help appreciated Laughing




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116 posts

Master Geek
+1 received by user: 4

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  Reply # 511585 25-Aug-2011 08:14
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After some reading I have a few things to try.

Math_Physics_Bardwell_v2
http://www.connect802.com/download/techpubs/2008/my_chauffeur_BD0414.pdf

Carbon is a great absorber of microwave at 2.4ghz.
This is just what I need
http://www.lessemf.com/fabric.html

But I will give some antistatic mats a try.
Hopefully they have a high enough carbon content to be useful without having to use too much.

Reflection could be an issue even if  I manage to get a beam but sine we will be out in the wild hopefully it will be less of an issue.

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