Omnidirectional Antennas

[Francois BERGERET]

Hi men,

Choose a "Down Tilted Omni antenna", or use Patches models with a
splitter to use 2 or 4 same antennas to open  the horizontal coverage
area more than with a single patch (about only 40 to 60? in general).

Take a look to antennas systems used with cellular phones networks
infra...

Have a good wireless link ;-)
Francois BERGERET,
France.

> -----Message d'origine-----
> De : hostap-bounces+f6hqz=easyconnect.fr at shmoo.com
> [mailto:hostap-bounces+f6hqz=easyconnect.fr at shmoo.com]De la part de
> Kelly Hogan
> Envoye : dimanche 28 mars 2004 04:10
> A : Dave
> Cc : hostap at shmoo.com
> Objet : Re: Omnidirectional Antennas
>
>
> Dave,
>
> How high are you placing your 15db omni?  How long is your coax, and
> what type?
>
> A common mis-conception is that omni's have deep vertical
> transmission
> patterns.  We have found that the higher the gain of omni, the thinner
> the doughnut of pattern around the antenna.  A lot of people
> place these
> high gain antennas way up high, expecting good coverage, then
> only find
> that they are putting the sweet spot over their targeted areas.
>
> Try lowering your antenna, or get its plot of coverage and do some
> good ol trig math to determine its best coverage area.  Then of course
> trial & error is good as well.
>
> We use a similar setup and get nearly 6-700m of good coverage.
>
> Best
> KH
> nomadisp.com
> > Right now I am currently using a 15dBi omnidirectional antenna with
> > Host-AP on redhat 9 with a senao nl-2511 CD Plus EXT2.  I like the
> > setup as far as the card and server go, but with the
> antenna I haven't
> > been really impressed with it so far.  As of right now I'm getting
> > about 150m when I should be getting at least 300m.  Has
> anyone found a
> > good omnidir antenna for a decent price?
> > I am getting ready to start my second hot-spot, am looking
> for a decent
> > antenna, with the same setup of card and server.
> >
> > Dave
> >
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>
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