Longer wireless range?

[wseyller]

Ok here is the deal-eo my sister is getting DSL at her business but it is not going to be offered at her home. Her home is like ~2 miles away.

I have played around with some long range stuff but nothing quite this far.

I have been reading about people using home made antennas to shoot a wifi signal 10 miles and some college guys did an 80 mile shot from two mountains.

What I was wondering is if anyone here has a background in this and could tell me if I am spinning my wheels.

I have looked at some sites and got a lot of formulas to calculate my angles/tilts/power/curve of the earth....ect. I *think* at anything under 10 miles earth curve should be negligible....right?

Basically what I was planning on doing was getting some altitude calculation and looking up the area on a topo map then trying to decide how high I was going to have to raise the antenna. I am thinking for 2 miles 30 feet (top of the building) and then maybe 10 feet at her home should be enough. The two antenna I have picked out are directional 24db gain with a 8 degree beam. Not sure how much loss for cable yet but I am going to try to keep it down. My power from the linksys WRT54G would be around 15 dbm but I can adjust between 0-84mw of power with my new firmware..

This by no means is going to be optical line of sight but I am wondering if the high gain antenna should help me over come some basic trees and other such obstruction and still keep me around 60% fresnel-zone?

I am trying to keep this low budge and in FCC standards also btw...so I have pretty much ruled and amp out.

Here is some of my pages I have been researching....Thanks for ANYONE who can give some help.

http://www.ilmukomputer.com/be...o-link-calculation.htm

<br>http://hyperlinktech.com/web/hg2424g.php

<br>http://www.ydi.com/calculation/fresnel-zone.php

<br>http://www.ydi.com/calculation/som.php

And for the real low cost option!
<br>http://www.wwc.edu/~frohro/Ai...imestar/Primestar.html


For other interesting info about long distance wifi

<br>http://palmtops.about.com/b/a/049175.htm

<br>http://palmtops.about.com/gi/...es.weber.edu/wireless/

 

[JackMDS]

You seem to be in the right track.

You probably will need some kind of geodesic/survey tool to measure the height and make sure that you are really pointing to the second Antenna.

With Length 2.4GHz coax cable cause very fast RF deterioration. I.e. you shold Install the WAPs on the Antenna?s masts and run CAT5e and power (Or POE if your hardware is POE capable) down to your source.

All of this must be adequately protected from the Weather elements, other wise one lighting storm and it is Toasted.

:sun:

 

[wseyller]

I don't think I would like my hardware outside

 

[tm37]

Other things to consider are these.
1. that signal will be out there for anyoine to grab.
2. You may be in violation of FCC rules by mounting a High power radio transmitter.
3. Weather will affect the thing quite a bit.

I looked in to doing this for My MIL (she lives two doors down). I looked a security and FCC radio requirements. Basically every thing that I looked at would have cost alot and You have to have line of sight as well so I would have needed to mount cthe thing UP HIGH and being as I had not licence it would have been like speeding with my hazard lights on.

The last other thing is read your TOS with the ISP. I doubt they would allow you to connect you neighbor inbto it much less beem that signal 2 miles away.