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air-net answers to the 2.4GHz question





 From the computer air-net crowd, implementing the 802.11b protocol, I have
found these antenna designs for 2.4GHz. (Note that their 'allocation' is
around 2.425GHz.)

 http://www.air.net.au is my local group. It is from them that I got the
idea
 for using the "bbq grill" antennas. They have been using them by removing
 the electronics package and replacing it with a piece of coax taking the
 signal to several-turn helix illuminating the dish from the 'feed point'.

 In Melbourne (Australia) they have a thriving group.
 Check out the 'yagi' using CIRCULAR (i.e. DISC) elements! (Lots of pix!)
 http://melbwireless.dyndns.org/pages.php?page=2.4Ghz+Yagi+Antenna
 It's more the IDEA that is worth a look!

 The helix...
 http://melbwireless.dyndns.org/pages.php?page=2.4Ghz+Helical+Antenna

 Seattle has some designs...
 http://seattlewireless.net/index.cgi/DirectionalYagi and their disc-yagi is
 detailed at http://seattlewireless.net/docs/antenna.txt

 and for a laugh...
 The Pringles Can-tenna (~15dB claimed) with the DISC elements, again!
 http://www.oreillynet.com/cs/weblog/view/wlg/448


 Peter
 VK1KEP


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