TechSpot

3000ft wireless range connection

By BlueSky
Mar 26, 2006
  1. Hi guys,
    I am trying to beam a wireless signal to my friend who is approx 3000ft away, in a somewhat open space (2-3 houses in between, a couple sparse trees). My idea is to purchase a pair of cantennas (12db 30degree beam) to make the connection.

    We did manage to get a max signal of 20 on NetStumbler using a 120degree sector antenna on my side, and a 6db usb mini panel style antenna on a laptop on their side. So hopefully a pair of good cantennas could up the signal?

    I would just like to hear an opinion or 2 before we shell out the money for the cantennas.

    Also, i'm wondering if height makes a difference? (ie--buying some good LMR400 and running a 25ft cable to put a cantenna on the roof instead of indoors?)

    Thanks.
     
  2. Samstoned

    Samstoned TechSpot Paladin Posts: 1,018

    i think it's more line of sight
    and some IT students managed to fire a signal ov 40,000 ft
    do search here I post links last week
    I am sure if you stay away from other signals it would work better
    my short hal modems for rs 432 have to be away from fluresent light ballasts
    so I think your WI-FI plans are close
    correction just found this wifi shoot out
     
  3. BlueSky

    BlueSky TS Rookie Topic Starter

    Thanks for that info. I do believe using the 2 cantennas should allow for a suitable connection.

    What i still can't figure out is how some people report getting long distance links using omni antennas..... at another location i have tried an 8db fibreglass and a 15db fibreglass mounted on a roof using LMR400 cable in clear LOS..... and i simply can't get any useable distance from the omnis whatsoever. I would love to use an omni because it would make the pointing process from the opposing cantenna much easier.
     
  4. BlueSky

    BlueSky TS Rookie Topic Starter

    hmmmmm i just had another thought.

    Perhaps i'd be better off using 2 AP's in bridge mode, rather than my friend installing a wireless pci card in their desktop........ the AP on their side would have higher mw output, and should provide a stronger link.

    I wonder though if we'd both need to do rooftop antenna installs to get just above the buildings in between us and make a clearer LOS?
     
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