n21roadie

I asked another antenna supplier about beam efficency and they responded with results for 3 frequencies

5.1ghz 54%, 5.5ghz 63% , 5.9ghz 72%

My questions are 

(1) Is for UltraDishTM TP 550 with a "Beam Efficiency** 60%"  is this the highest percentage beam efficency the antenna can achieve?

(2) Is there any plans to have a deep dish design to reduce co-location interference or a dish shroud

Update - The -60dBm noise floor is appearing on all RF Elements Antenna's 60° + 30° + SEC-CC-5-17, at this stage I am thinking that the issue maybe a Mikrotik ROS software glitch because the -60dBm is appearing on live production devices and they are working flawlessly since put up in the spring this year,

I did some frequency tests

(1) 20Mhz scan : No -60dBm,

(2) 40Mhz scan: just 1 result -60dBm

(3) 80Mhz scan : 2 results -60dBm,

Back to Mikrotik support to comment on this issue?

I have done another Frequency usage from another site and once again Noise Floor of -60 (attached screenshot !) , i had to conduct a quick test as it was a live production site!

Something is seriously wrong with HG3-TP-A60 60° as this is occurring on 4 horns (3 at one site, 1 at another site) 

We also use Mikrotik RMB11G + M11G combination onto RF elements SEC-CC-5-17 sectors but once again they are in live production, so i will have to wait for off peak time to test!

Hi, when there is 3 horns that are pointing in 3 different directions and have similar issues this is most confusing? 

(1) Why all at noise floor numbers at -60dBm, why not some at any other levels  ?

(2) A scan from a CPE pointing in same direction does NOT have any noise floor at -60dBm ?

(3) Of the 20 frequencies listed above at -60dBm only 3 are used on other AP's at the site the remaining 17 frequencies are not used?

(4) We have already replaced Mikrotik RMB11G + M11G and unfortunately same issue?

(5) I had posted the issue on Mikrotik forum and so far haven't got any replies to pin point the issue (https://forum.mikrotik.com/viewtopic.php?f=7&t=169254 )

We have another horn at another site but as its in live production I will have to wait until traffic is reduced to do a frequency scan.

I have noticed that on 3 X RF Elements TwistPort Adaptor RBC for RouterBoard+RF Elements HG3-TP-A60 60° + Mikrotik RMB11G + M11G miniPCIe there is reduced noise floor -60 ?

Also noticed if I leave the frequency usage run for say 30mins the -60 frequencies listed will increase up to 8 from 1 and vary from these numbers, I counted a total 20 X -60 listed (5200-6000 scan ) 

As there is 3 horns with same problem is there a design issue with the horns?

OK Thanks for Clarifying - Can I ask is there any tool available for unseating RJ45 plugs in TwistPort^TM Adaptor for RouterBOARD RB, inserting the RJ45 plug is not easy on a mast but trying to remove the RJ45 plug is extremely difficult? 

Can someone explain what exactly this item does on a TwistPort^TM Adaptor for RouterBOARD RBC ?

Hi, Is there a twist port adapter available for Mikrotik MIMO 3x3 triple chain 802.11ac card in miniPCIe, R11e-5HacT5Ghz miniPCI-e, 802.11ac/a/n tripple chain, 3x MMCX  

17 hours ago, Tasos said:

@n21roadie- Not really. It main functions are forming the beams so both the Vertical and Horizontal coverage areas are the same and then reducing back radiation. You may see some improved co-location on top an bottom depending on what sector you compare it to, but for the most part you should use vertical space separation like other sectors. Or you should look at our Horns for the best isolation in all directions.

We current only use for sectors - RF Elements SEC-CC-5-17 ( which I believe is now discontinued!) we space them about 1+ meters vertically apart, we have tried first generation

of horns but it appears from listening to the webinars the alignment of 30/40 degree horns are super critical? 

Also we are a little confused by the mounting of the second generation horns (  https://rfelements.com/products/wireless-broadband/asymmetrical-horn-tp-antennas/overview#60-asymmetrical-beam-antenna-hg3-tp-a60) with asymmetric beam pattern should the longest part of the horn opening be horizontal (in the above example 342mm side be horizontal?) 

Does the back shield provide any noise reduction above and below the sector?