Dual-Polarized Wifi Antennas

Discussion in 'Wireless Internet' started by kevin.pavin, Dec 27, 2006.

  1. kevin.pavin

    kevin.pavin Guest

    Hi all,

    I'm looking to purchase an dual-polarized antenna that operates at
    2.4Ghz. In particular its necessary that the phase centers of each of
    the elements be close to spatially identical. So I guess something
    like a patch antenna with the elements making an X pattern and
    centerfed feeds. Any suggestions where to order such an antenna? I've
    purchased most my antennas from hyperlink but don't carry this sort of
    antenna. Thanks for any suggestions,

    Kev
     
    kevin.pavin, Dec 27, 2006
    #1
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  2. kevin.pavin

    Jerry Martes Guest

    Hi Kev

    Do you want circular polarization or will you use switching to *either*
    antenna?

    Jerry
     
    Jerry Martes, Dec 27, 2006
    #2
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  3. kevin.pavin

    kevin.pavin Guest

    I want seperate feeds, one from each, so individually I will have a
    vertical and a horizontal polarized antenna with co-located phase
    centers.
     
    kevin.pavin, Dec 28, 2006
    #3
  4. Search for "polarization diversity antenna". You should find some
    such as:
    <http://www.hyperlinktech.com/web/re11dp.php>
    There are plenty of dual polarization and circular polarized antennas,
    but most have a single coaxial feed line.

    I don't know of anyone doing dual crossed dipoles (or colinears) with
    a common phase center. The design of the coax to dipole transition
    would be rather messy. Two baluns in close proximity would be
    necessary, and they are certain to couple to each other.

    The requirement for a common phase center is rather odd. I can only
    speculate that you're trying to feed a dish reflector with this
    antenna. If this is the case, there are better ways to do diversity
    polarization such as a "can" type of feed, with two feeds positioned
    90 degrees apart.

    Some clue as to what you are trying to accomplish would be helpful.
     
    Jeff Liebermann, Dec 28, 2006
    #4
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