Archived from groups: alt.internet.wireless (
More info?)
"Steve Knoblock" <knoblock@NOSPAMatt.net> wrote in message
news:4tmqm0tqflir4jgh8n5ga1n7hnp8ibt9fu@4ax.com...
> We have a studio about 300 yards from the nearest wifi access point or
> network connection and would like to bring broadband out to it. Line
> of sight is obscured by a tree line. Could a wifi repeater help so we
> could go around the trees through a nearby field?
>
> I would appreciate any suggestions on where to start researching.
>
> Steve
300 yards is not a long distance for a 2.4 GHz 802.11b/g signal. If you
can't get a clear, unobstructed shot through the trees, then you can use a
repeater in the middle. The biggest problem with using a repeater is
electricity - there never seems to be an AC outlet close enough, and the
power source has to be weatherproof. Any equipment mounted outside must
weather sealed, including the cable connections. You'll need to check the
weatherproofing periodically.
You would need to position the repeater where each end has a clear,
unobstructed line of sight to it. Mount the antennas as high off the ground
as possible - what Walter Roberson said about the Fresnel zone is absolutely
right. You don't want the signal to skim low along the ground. There has to
be plenty of clearance above, below and alongside the main line of site
between the antennas. The longer the distance between antennas, the more
clearance needed. There's a formula for calculating it but I don't have it
handy.
The repeater would need either an omnidirectional antenna or a directional
with a wide enough coverage field to cover each end. At the far ends use
directional antennas with the highest gain you can find. Aim the antennas
the best you possibly can.
If you go ahead with this please make a post here to let us know how you
made out.
Larry
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