Any good sites for vertical antenna designs?

[Guest]

Archived from groups: alt.internet.wireless (More info?)

I am looking for vertical colinear antenna designs that are a bit out of the
ordinary. Are there any good site?




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[Roger]

Archived from groups: alt.internet.wireless (More info?)

VK3KCG wrote:
> I am looking for vertical colinear antenna designs that are a bit out of the
> ordinary. Are there any good site?

Hi Geoff, there's lots of places on the net to research antenna design.
Have you tried Google? Found any investors yet?

 

[Guest]

Archived from groups: alt.internet.wireless (More info?)

On Mon, 26 Jul 2004 11:16:07 +1000, "VK3KCG" <VK3KCG@nospamamsat.org>
wrote:

>I am looking for vertical colinear antenna designs that are a bit out of the
>ordinary. Are there any good site?

I'll assume 2.4GHz. Sorry, there's no such thing as an "ordinary"
antenna.

Start with a good antenna modeling program. If you plan to make
changes to existing designs, you'll need to model the changes. I
suggest 4NEC2 version 5.39 which is free and can be best downloaded
from:
http://www.funet.fi/pub/ham/antenna/NEC/4nec2v539.zip
http://www.funet.fi/pub/ham/antenna/NEC/4nec2X539.zip
Install both. Read the readme and walk through the instructions. If
you have a basic understanding of how antennas work, you should have
few problems.

List of other NEC design and modeling software:
http://www.qsl.net/wb6tpu/swindex.html

Some 4nec2 results for a 1lb (100mm x 185mm) coffee can antenna:
http://www.LearnByDestroying.com/pics/antennas/coffee2400/
This is the design from Trevor Marshall's site.

Some do it thyself plans found in my bookmark pile and with Google:
http://www.wlan.org.uk/antenna-page.html
http://www.centurion.com/pdf/wp_omni_wireless.pdf
http://www.LearnByDestroying.com/pics/tecom/index.html
http://www.amsterdamwireless.net/workshop-15-12/3.html
http://www.wlan.org.uk/co-linear.gif
http://www.guerrilla.net/reference/antennas/2ghz_collinear_omni/
http://www.seattlewireless.net/index.cgi/OmniDirectionalAntenna
Plenty of others. Good luck.

--
Jeff Liebermann jeffl@comix.santa-cruz.ca.us
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 AE6KS 831-336-2558