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How to calculate anteena height….???

  • This topic has 19 replies, 1 voice, and was last updated 13 years ago by mahesh kolte.
Viewing 15 posts - 1 through 15 (of 20 total)
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  • #46781 Reply
    sourabh khatri
    Guest

    Hi

    can anybody tell me on which factors our antenna height in a microwave links depends on… an how could we calculate a antenna height..?

    Plz tell me the answer on write2khatri@yahoo.com

    #46782 Reply
    Rafi
    Guest

    Line of sight is the most important factor which depends upon many factors like surrounding area(open/suburban/urban/roads.

    #46783 Reply
    graham
    Guest

    all depends on height of mast if its not high enough does not matter about minimum dish height.

    #46784 Reply
    yash
    Guest

    which antenna has a high coverage area (900,1800) &through what relation?

    #46785 Reply
    Pix
    Guest

    Hi Yash,

    It is not about the antenna, but rather the frequency band of the antenna ! You can find the formula here :
    en.wikipedia.org/wiki/Free-space_loss
    relation : Free space loss

    you’ll see that 900MHz provides twice more rx power at the same distance (twice the power = +3dB).

    Furthermore, 900MHz tends to get less attenuation from obstacles (such as buildings, windows, trees, etc.), so it covers further away.
    en.wikipedia.org/wiki/Hata_Model_for_Urban_Areas
    relation : Okumura Hata, Radio propagation, etc…

    #46786 Reply
    Tufail
    Guest

    Hi All,

    Antenna height of Microwave antenna depends upon the path profile of the link.

    you need to calc all hi building, tree, any obstacle ht with ther coordinates under da LOS. and after that used some pathloss input ur frequency and all obstable ht n ther AMSl.

    da software will cal da antenna ht.

    rgds
    Tufail

    #46787 Reply
    yash
    Guest

    THANKS

    what is the purpose of surgearester in BTS

    #46788 Reply
    Navdeep Singh
    Guest

    please consider the AMSL above mean sea level for calculation of hieght of the antenna at each location.that will be accurate formula to calculate the hieght of the microwave site.

    #46789 Reply
    Imran Sabir
    Guest

    The antennas centre line calculation is done on the basis of three things.
    1)AMSL of the critical point between the two sites
    2)K factor you chose for the link
    3)Fresnel zone clearance

    When you add all these three criterias it will give you the optimized height of your microwave antenna.

    #46790 Reply
    Sachin Dange
    Guest

    What should be the distance of the BTS from a Petrol Storage Tank.

    #46791 Reply
    Robert Espiritu
    Guest

    Hi

    can anybody tell me on which factors our antenna height in a microwave links depends on… and how could we calculate a antenna height..?

    #46792 Reply
    koush
    Guest

    Attenuation:
    Less freq >> Less attenuation
    More freq >> More attenuation

    Break point:
    Small freq >> high B point
    High freq >> Low B point
    B.point= h1*h2/lampda

    Also you relation on fresnel-zone & propagation slope.

    #46793 Reply
    jacob
    Guest

    if you referring for mwave installation is one for LOS first and designed. like the one said its the frequency,fresnel and what
    the climatic factor and types of mwave u will install

    #46794 Reply
    sharjeel
    Guest

    hiiiiiiiiiii to all…
    kindly can you tell me that what is meant by fresenl’s zone… in detail…
    thanx
    with regards

    #46795 Reply
    pix
    Guest

    hellooooo 🙂

    you will find plenty of information on google :
    for instance :
    en.wikipedia.org/wiki/Fresnel_zone

    “To maximize receiver strength, one needs to minimize the effect of the out of phase signals by removing obstacles from the RF Line of Sight (RF LoS). The strongest signals are on the direct line between transmitter and receiver and always lie in the 1st Fresnel Zone.”

Viewing 15 posts - 1 through 15 (of 20 total)
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