Wireless Access

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Access network design for branch, remote, outdoor and campus locations with Aruba access points, and mobility controllers.
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Looking for a dual band 3x3 MIMO antenna with 30 degress or less

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  • 1.  Looking for a dual band 3x3 MIMO antenna with 30 degress or less

    Posted Jul 02, 2015 11:57 AM

    Hello Airheads,

     

    I'm looking for a dual band 3x3 MIMO antenna to use with the AP-224 in a VHD environment. I'm looking for options with 30 degress or close to it. Could you please recommend the manufacturer and model for it?

    Aruba provides a 60 degree option but I need less degrees.

     

    Thank you,

    Leonardo



  • 2.  RE: Looking for a dual band 3x3 MIMO antenna with 30 degress or less

    Posted Jul 02, 2015 12:01 PM
    Do you need it for client access or mesh back haul?


  • 3.  RE: Looking for a dual band 3x3 MIMO antenna with 30 degress or less

    Posted Jul 02, 2015 12:20 PM
    It's for client access


  • 4.  RE: Looking for a dual band 3x3 MIMO antenna with 30 degress or less
    Best Answer

    Posted Jul 05, 2015 05:02 PM

    Aruba doesn't produce a 30deg x 30deg dual band antenna. The closest option is a dual-band 60deg. If you want to share your setup and requirements, I might have more information to offer, just let us know. 



  • 5.  RE: Looking for a dual band 3x3 MIMO antenna with 30 degress or less

    Posted Jul 05, 2015 05:15 PM
    The requirement is to maximize the number of cells in overhead coverage environment. About 15 meters high, 75 x 50 m area. I need about 35 cells and 2.4GHz is a must.


  • 6.  RE: Looking for a dual band 3x3 MIMO antenna with 30 degress or less

    Posted Jul 05, 2015 05:37 PM

    What AP model are you planning to use? If the AP-228, then you can use separate 2.4 and 5Ghz antennas since those antenna connectors are not diplexed. However, using your numbers, to generate a cell for an approx 75x50m area at 15m AGL, 30deg would not be enough beamwidth, you would need ~60-90 deg min.

     

    Assume radius of 35m (to cover approx 70x70 for easy math), at 15m height, drawing a right triangle, that angle at the top would be approx 60deg, for a 120deg beamwidth need. Using a 60deg or 90deg antenna would be determined by your spacing/overlap ratio plans. But 30deg seems kind of narrow for such a small cell at such a short height. A 30deg antenna aimed straight down at 15m elevation would give a coverage of 4m radius or 8m diameter. That's too small.



  • 7.  RE: Looking for a dual band 3x3 MIMO antenna with 30 degress or less

    Posted Jul 05, 2015 06:29 PM
    AP-224, I do not need one big cell. For the amount of users in this space I planned 35 micro cells, that's the reason for the 30 deg bw antenna.


  • 8.  RE: Looking for a dual band 3x3 MIMO antenna with 30 degress or less

    Posted Jul 06, 2015 05:31 PM


  • 9.  RE: Looking for a dual band 3x3 MIMO antenna with 30 degress or less

    Posted Jul 10, 2015 02:51 AM

    35 cells in a 50x75m area? Makes more sense...

    Just note that Aruba doesn't support the use of 3rd party antennas (we can't validate their radio and RF characteristics), so this would be a use at your own risk kind of antenna solution for the 224 and warrants testing. Unfortunately, Aruba as a vendor doesn't make RP-SMA-based 30deg dual band high gain antennas.



  • 10.  RE: Looking for a dual band 3x3 MIMO antenna with 30 degress or less

    Posted Dec 13, 2016 12:32 PM

    I have a similar scenario.

    A few 200 person seating sections, sitting 35.5 feet high at the center of the section, angled about 40 degrees. Antenna is 55 feet high, giving a 19.5 height in relation to the seating sections. 30x30 degree antenna would give me about a 39ft fresnel at the seats.  The ANT-4x4-5314 would cover me for 5Ghz, but i haven't a solution for the 2.4. A 3x3 version of the ANT-2x2-2314 would be a good fit. But this will only work using an AP-228. Since there is no 30x30 degree RP-SMA antenna it seems I cannot use the AP-224. With a 30x30 degree I was going to use 2 APs per section.



  • 11.  RE: Looking for a dual band 3x3 MIMO antenna with 30 degress or less

    Posted Dec 14, 2016 01:46 AM

    Would need to use the 228 with RP-SMA to N jumpbers, then the 5314 and 2314 antennas mounted separately. There are functional design considerations in making a 30x30deg dual-band antenna (it usually ends up where the 5Ghz is significantly narrower). 



  • 12.  RE: Looking for a dual band 3x3 MIMO antenna with 30 degress or less

    Posted Dec 14, 2016 08:22 AM
    But the 2.4 only being a 2x2 will cut my bandwidth by a third, correct? Is there a special cap I can put on the third stream of the 2.4 radio stream on the 228?






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    Network Engineer
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  • 13.  RE: Looking for a dual band 3x3 MIMO antenna with 30 degress or less

    Posted Dec 14, 2016 10:19 AM

    The vast majority of clients only support 2x2 capability anyways.  Unless you can control the capabilities of all clients to make them 3x3, it might not be a big difference.