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Occasional Contributor
Posts: 6
Registered: ‎02-16-2016
Accepted Solution

RF Elements Sym Horn Sector with ePMP 2000 Smart Antenna

Hi all,

 

Can the RF Elements Symmetrical Horn Sector work with the ePMP 2000 Smart Antenna? To me this really shouldnt' be an issue, as the Cambium ePMP sector operates independantly to the the Smart beam forming antenna... Although it is probably better suited to a 90 degree sector?

 

Thoughts? Has anyone tried it already?

 

Thanks,

Tim

Regular Contributor
Posts: 187
Registered: ‎08-19-2014

Re: RF Elements Sym Horn Sector with ePMP 2000 Smart Antenna

It might work but I doubt you would see the benefits of the smart antenna. assuming you are wanting to use one of the narrow-beamwidth horns (30 or 40*).  The smart antenna forms similarly narrow beams throughout the 90* pattern of the standard sector in order to improve uplink SNR in those beams.  Using the narrow horn you have already done the same.

 

The 30* horns do work well though.  I have a few 30* units paired with ePMP 1000 access points and uplink tends to be solid MCS 14~15 with CPEs 5~6 miles out and very stable.  

 

The two solutions really have different use cases.  Covering 360* with narrow horns isn't very realistic because of spectrum constraints, a cluster of wider coverage sectors is a better approach for that.  The horns are ideal when you need higher subscriber density in a sector, have limited horizontal coverage needs, or have a large elevation difference between subscribers and the access point.

Occasional Contributor
Posts: 6
Registered: ‎02-16-2016

Re: RF Elements Sym Horn Sector with ePMP 2000 Smart Antenna

Hi Jacob,

 

Thanks for your thoughts.

 

Wide horizontal coverage is a nice to have, however the increased vertical coverage makes a lot of sense when considering the expence of expanding vertically. We have a site very high up with clients at distance and clients immediately below...

 

Technically I think that if we stick to a 90 degree horn, the smart antennae should operate normally. Anyone from Cambium disagree with the summation?

 

Equally, smaller beam widths would also work, but there would be some overlap. Assuming...

 

Cheers,

Tim

Cambium Employee
Posts: 515
Registered: ‎01-15-2014

Re: RF Elements Sym Horn Sector with ePMP 2000 Smart Antenna

[ Edited ]

Hello,

 

We have not tested ePMP2000 Smart Antenna option with third party antennas. Having said that, functionally, there is no dependency between the Cambium Sector Antenna and the Smart Antenna. The Beamforming/Antenna Selection algorithm running in the ePMP2000 AP uses Rx signal levels and UL packet statistics to determine which antenna performs better for each SM and it is not tied up to any specific sector antenna.

Of course, the characteristics of the sector antenna you select (radiation pattern, gain) will impact the parameters used by the algorithm, and hence the antenna selection for UL, but it should not prevent the ePMP2000 and Smart Antenna from working with your third party antenna.

 

Regards

 

Occasional Contributor
Posts: 6
Registered: ‎02-16-2016

Re: RF Elements Sym Horn Sector with ePMP 2000 Smart Antenna

Great, thanks for the feedback Luis. Will let you know when we get around to testing it.

 

Regards,

Tim