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atenna back loop

Viewing 7 posts - 1 through 7 (of 7 total)
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  • #56365 Reply
    Mazin
    Guest

    how far can go the back loop of the 1800M, when there is normal terrain and the height of the antenna is 40Meters

    #56366 Reply
    Pix
    Guest

    about one-eigth of the front lobe, roughly.

    If the fron cell coverage is 800m, then the back lobe is about 100m…
    but that’s really just a rough estimation 🙂

    it depends on mechanical and electrical downtilt applied to the antenna though.

    #56367 Reply
    paraHO
    Guest

    Pix said “about one-eigth of the front lobe, roughly.”

    Pix is that manufacturer specific or is that rule of thumb applied generally from a particular GSM/3GPP Standard, please?

    #56368 Reply
    Pix
    Guest

    Pure rule of thumb…
    A back lobe has an attenuation of -30dB. Typical propagation models say that -10dB = coverage divided by 2.

    so -30db = coverage divided by 8.

    rule of thumb.

    But you must take into account the tilt also !

    #56369 Reply
    Mazin
    Guest

    my antenna is kathrein 739684 it’s height is 40m and you can get the back loop from around 18m that is what i saw practically.

    #56370 Reply
    Pix
    Guest

    What do you mean by “get from” ?
    I’m not sure we’re talking about the same thing…

    #56371 Reply
    Sikander Lawang
    Guest

    Two GSM companies want to erect Their Towers 15m far from each other. is this possible?
    Are they will face FI, EMI or back loop interference
    Want to know about interference and or legal distace bW tow towers

Viewing 7 posts - 1 through 7 (of 7 total)
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