Wireless Access

Hi experts,

 

Some time ago I was in a Ruckus seminar where they said among other things (BeamFlex and so on) their APs always transmit with dual polarization, which is great since no matter what is your position you'll always get a good signal as long as you are not far from the AP. I have seen there are Aruba external antennas which are dual polarized, but do you know if the Aruba APs with internal antennas are dual polarized? There is no information about this in their datasheet.

 

Regards,

Julián  

Hi Julian,

AFAIK only the 335 had a software programmable antenna to optimize polarity.
For the others you can check the antenna pattern in the data sheet

Hi Frank,

It would be great Aruba offers this feature for other APs and not only for model 335. For this one, is this done automatically? Maybe each polarization is weighted based on the SNR the AP gets from the client according to different combinations of polarizations?

Regards,
Julián

Hi Julian,

 

This is from the datasheet of the AP-335:

 

• Antenna polarization diversity for optimized RF performance - Each 5 GHz radio chain has a switch and two antennas - Software controlled; Horizontally and vertically polarized

so it is automatic.

 

I don't think we will see it on other AP's, Aruba put in twice the antenna's for 5Ghz so have this feature. Both the AP-325 and AP-345 'only' have 8 antenna's, the AP-335 has 12.

 

Hope this helps

 

 

Hi,

 

Although looking at the 340 series datasheet:

 

• Antenna polarization diversity (fixed) for optimized
  RF performance
• AP-345: Internal antenna models. A total of eight internal omni-directional downtilt antennas
• Radio 1: four cross-polarized dual-band downtilt omni-directional antennas for 4x4 MIMO with peak antenna gain of 5.8dBi (2.4 GHz) and 5.6dBi (5 GHz) per antenna.                         » With AP in dual-radio mode: used for 2.4 GHz only                 » With AP in dual-5 GHz mode: used for lower 5 GHz only
• Radio 0: four cross-polarized 5 GHz downtilt omnidirectional antennas for 4x4 MIMO with peak antenna gain of 5.5dBi per antenna                                                                                           » With AP in dual-radio mode: used for full 5 GHz only               » With AP in dual-5 GHz mode: used for upper 5 GHz only

Regards,

Julián

Hi Julian,

 

They are fixed, not software adjustable.  

The AP-335 is a more expensive AP then the AP-345.

Because the antenna's on the AP-345 are optimized, they are doing the job!