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directional antenna deployment question---why signal on the feeder side is weaker than the opposite side?

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  • 1.  directional antenna deployment question---why signal on the feeder side is weaker than the opposite side?

    Posted May 11, 2022 03:07 AM
    Hello everyone
    The problem I have now is that the signal on the feeder side is weaker than the signal on the opposite side when doing the streaming test, the AP uses 534, and the directional antenna uses AP-ANT-45 and AP-ANT-48. The height of the directional antenna from the ground is 2.614m, and the deployment method adopts ceiling deployment.
    I am now using ixchariot streaming software to test, the distance between APs is 28 meters, no blocking, each AP is connected to a single or multiple terminals, and the distance between terminals and APs is different.
    Question 1, what is the correct way to connect the feeder to the AP, because I found that there are 1-4 labels on the feeder, and 0-3 pin numbers on the AP. Impact.
    Question 2: Is there a more reasonable opinion on the placement of the directional antenna?
    Question 3. The directional antenna adopts the ceiling-mounted deployment method. Is it normal that the signal on the feeder side is weaker than the opposite side?
    Note: The feeder side refers to the A direction, and the opposite side refers to the B direction.



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    xudong wang
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  • 2.  RE: directional antenna deployment question---why signal on the feeder side is weaker than the opposite side?

    Posted May 12, 2022 08:05 PM
    Directional antenna is meant to be install on walls/poles vertically to allow beam pattern going horizontally.  AP-ANT-45 had 90 degree beam width and AP-ANT-48 has 56 degree (5GHz)  and 70 degree (2.4GHz) beam width.  In a office environment ( like  on your photo) , better to use omni directional antennas or   AP-535 with built in omni. 




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    Asela Abhayapala
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  • 3.  RE: directional antenna deployment question---why signal on the feeder side is weaker than the opposite side?

    Posted May 15, 2022 11:41 PM
    How can you help answer questions 1 and 3?

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    xudong wang
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  • 4.  RE: directional antenna deployment question---why signal on the feeder side is weaker than the opposite side?

    EMPLOYEE
    Posted 23 days ago
    1) There is no required order if you connect 4 feeders to 4 connectors. I would put them in order (feeder 1 to antenna 0; 2-1; 3-2; 4-3) but there really is no critical difference.
    3) The antenna that you have on the photo looks like a directional antenna pointing to the floor. What you see as signal strengths in the direction A and B is really undefined (you can look it up in the datasheet, but directional antennas typically have a 'null' at 90 degrees so signals may be really weak/bad. The indoor APs with built in antennas (except for the RAP models) are designed to be mounted horizontal flat to the ceiling. External directional antennas are typically mounted vertically (to wall or mounting pole) and pointing 90 degrees from the surface to where you need the signal with a small tilt depending on the exact required coverage and antenna type. For ceiling mount onmi-directional, the AP-ANT-40 may be a better choice, but an AP with built-in antenna probably is even better. Please check with your Aruba partner or local Aruba sales team what would be the best option for your specific situation.

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    Herman Robers
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    If you have urgent issues, always contact your Aruba partner, distributor, or Aruba TAC Support. Check https://www.arubanetworks.com/support-services/contact-support/ for how to contact Aruba TAC. Any opinions expressed here are solely my own and not necessarily that of Hewlett Packard Enterprise or Aruba Networks.

    In case your problem is solved, please invest the time to post a follow-up with the information on how you solved it. Others can benefit from that.
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