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Extending the range of a wireless LAN

Discussion in 'Hobby Electronics' started by Jeff, Oct 21, 2006.

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  1. Jeff

    Jeff Guest

    Hi Group,
    I am looking into extending the range of a wireless LAN setup - I would like
    to reach a target approximately 400 meters away.
    I could setup external antenna/s on the source but the receiver will only be
    a laptop with no access or provision for external antenna's.

    Has anyone had experience in overcoming this sort of problem?

    Jeff
    jeffqld_at_gmail.com
     
  2. Borat

    Borat Guest


    No experience, just aware of the following from lunch break chat. Free net
    access via maccas?

    Would a passive repeater work?



    http://www.oreillynet.com/cs/weblog/view/wlg/448
    "As I happen to be 0.6 mile LOS from ................."

    http://www.cantenna.com/
    http://www.turnpoint.net/wireless/cantennahowto.html
    http://www.cruftbox.com/cruft/docs/cantenna.html
     
  3. atec77

    atec77 Guest

    You need an external antenna , if it has a nic then apply a suitable
    router/ap mounted in a water proof box under the external and cat back
    to the lappy ( although you might detect the wireless in the house it is
    unlikely) email me if you want more information ,



    is it 400m in the clear line of sight ? ( or it wont work)
     
  4. jasen

    jasen Guest

    put a wireless repeater/bridge behind (or near) the laptop with a high-gain antenna.

    or do the USB-wifi + reflector thing with the laptop..

    Bye.
    Jasen
     
  5. Spajky

    Spajky Guest

    Only? :)
    Hope you have an USB port .. :)
    Sure! :) here is a repost ... from sci.electronics.design
    ============================================
    get the cheapest Usb one like Canyon CN-WF518 for 20$ :)
    set to 802.11b Only mode!
    USB one (easier to implement "enhancing") ... & do some enhancing
    with it ... Buy cookies in a reusable tin box! For few km links :)
    .... see some mine experiments & data (measures etc) ... text you won´t
    understand (sorry still not translated in english for my site,
    planning to do it in few months when having time to spare ..) ´cause
    its in my native one -slovene ... check fotos: SpajkyTenna®s :))

    wifi USBkeY range Enhancers-boosters ´4 Dummies´
    http://www.wlan-sat.com/modules.php?name=Forums&file=viewtopic&t=4102

    ST® - CorNET™ enhancers w/antennas 12dBi ... :)
    http://www.wlan-sat.com/modules.php?name=Forums&file=viewtopic&t=4241

    You´ll get some clues .. :)))
     
  6. Terryc

    Terryc Guest

    Yep

    1) It MUST BE be clear line of sight. Anything in between (walls, glass,
    etc can stop it working.

    2) If that doesn't work, then you need an NIC that will take an external
    aerial, which you install with clear line of sight.

    3) If that doesn't work, then you needs a focused external aerial (about
    $300 each) and clear line of sight.

    4) If that doesn't work, then something ic fscked.


    Theoretically, you can stand 400 metres away across a cleared paddock
    and depending on the nics, they should connect. Sometimes you might need
    to stand on a tall ladder at each end.

    Generally, the internal aerials are crud for distance. They are really
    only designed for a WAP in the top corner of a room.
     
  7. atec77

    atec77 Guest

    Suitable aerials are available for less if you know where , I would
    suggest most situations are covered by the home made bi-quad antenna
     
  8. Larry

    Larry Guest

    atec77" <""atec77 \"@ hotmail.com wrote:
    : Terryc wrote:
    :: Jeff wrote:
    ::: Hi Group,
    ::: I am looking into extending the range of a wireless LAN setup - I
    ::: would like to reach a target approximately 400 meters away.
    ::: I could setup external antenna/s on the source but the receiver will
    ::: only be a laptop with no access or provision for external antenna's.
    :::
    ::: Has anyone had experience in overcoming this sort of problem?
    ::
    :: Yep
    ::
    :: 1) It MUST BE be clear line of sight. Anything in between (walls,
    :: glass, etc can stop it working.
    ::
    :: 2) If that doesn't work, then you need an NIC that will take an
    :: external aerial, which you install with clear line of sight.
    ::
    :: 3) If that doesn't work, then you needs a focused external aerial
    :: (about $300 each) and clear line of sight.
    :
    : Suitable aerials are available for less if you know where , I would
    : suggest most situations are covered by the home made bi-quad antenna
    ::
    :: 4) If that doesn't work, then something ic fscked.
    : agreed
    ::
    ::
    :: Theoretically, you can stand 400 metres away across a cleared paddock
    :: and depending on the nics, they should connect. Sometimes you might
    :: need to stand on a tall ladder at each end.
    ::
    :: Generally, the internal aerials are crud for distance. They are
    :: really only designed for a WAP in the top corner of a room.

    Check here for home made antenna info
    http://www.wardrive.net/general/antenna
     
  9. Terryc

    Terryc Guest

    Agreed, but I expect OP isn't looking for a home made solution, thus he
    could be pleasently surprised when he found a cheaper commercial aerial,
    That was actually an old price on a high gain directional from Rojone.
    Considering that peeps have 8kms (hill top to hill top) on pringles
    can, but that was fiddlers and sadly they only used netstumbler and
    didn't test through put.
     
  10. atec77

    atec77 Guest

    COmpnay based in WA with outlets in most states has a suitable for
    around $160.00 plus mount
    It's easy to achieve with the right equipment .
     
  11. Terryc

    Terryc Guest

    that was basically what we were demonstrating. so long as you ave good
    line of sight, no problems.

    Sadly I'm in a valley and were did all these trees come from {:)


    and line of sight
     
  12. atec77

    atec77 Guest

    I have a link atm nice and solid line of sight , over 40k :)
    until it rains .
     
  13. APR

    APR Guest

    Hi atec77, what are you using at each end and for the aerials and what speed
    can you maintain?
     
  14. atec77

    atec77 Guest

    The devices are commercial 21 db devices (aerials) and it's fast enough
    to do whats needed so better than I expected ( unless it rains)
    also a fair bit of heliax and some range boosters :)
     
  15. Jeff

    Jeff Guest

    Thanks to all the useful posts, I will continue my research on antenna's
    etc.

    Yes I did leave out the vital "line of sight" situation that I need to over
    come, with increasing the height of the "base" I should be ok.

    Once again thanks for all who have given me some more directions to take.

    Regards
    Jeff
    jeffqld_at_gmail.com

    ------------------------------------------------------
     
  16. Spajky

    Spajky Guest

    new article/sorry still not translated in english ...
    Ultimate wifi antenna TinCan Enhancers - part-2 ...
    http://www.wlan-sat.com/modules.php?name=Forums&file=viewtopic&t=4782
     
  17. Jonno

    Jonno Guest

  18. Spajky

    Spajky Guest

    I did something similar (20dBi) already ... :))
     
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