Trying to find good antenna to carry long distance

Discussion in 'General Discussion' started by Anonymous, Mar 9, 2005.

  1. Anonymous

    Anonymous Guest

    I was told I could get my wireless signal to travel about 3-4 miles with the proper antenna any ideas? Or is it untrue
  2. jagboy

    jagboy Network Guru Member

  3. t4thfavor

    t4thfavor Network Guru Member

    anything 2.4ghz and directional will work. but you will have to have a decent line of sight
  4. jdepew

    jdepew Administrator Staff Member Member

    The majority of the third party firmware solutions will provide the necessary means to boost power output.

    When combined with a directional antenna at both ends you have got yourself a solution - You are probably looking at about a 15dBi antenna for that kind of range. If someone knows better about this - PLEASE correct me.

    If you are using the WRT54G/GS series of routers, the antenna connector you are looking for will be RP-TNC.
  5. kakee

    kakee Network Guru Member

  6. oopsibrokeit

    oopsibrokeit Network Guru Member

    fat antennas :)

    I'm keen on these guys...

    preferebaly a parabolic, although anything which is highly directional (ie not an omni antenna) will do.

    to go 3-4 miles you will need to boost power to max, and have clear line of sight.

    at max power and not quite line of sight you can get 2 miles (i know, i'm doing this one!)

    However: beware the FCC or whoever regulates your local communications system. If you start banging watts (rather than milli-watts) of power through things, they WILL get upset. I have had an aquaintance fined £5000gbp for creating a network which was radiating about 3 watts of power (I did warn him!!). - thats more than some licensed commercial radio stations are allowed to put out!!

    my 2 mile link radiates 102mW (100mW is actually the legal limit but they aren't bothered about my 2mW aparently) and has had a written OK from my local branch of the UK's version of the FCC.
  7. t4thfavor

    t4thfavor Network Guru Member

    the actual input power and the ERP effective radiated power are 2 different things.

    if yu put in 100mw and have a 7dbi gain antenna you have a 611mw transmitter asuming there is no line loss.

    so yur friend at 3W was (with 7db antenna) was actually at around 9.16805

    here is a calculator to find ERP 1W = 1000mw
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