MA-ANT-27 antenna installation question

[JosueRuiz]

I have a deployment of MR76 APs with MA-ANT-27 antennas. My question is whether a single antenna can have a connection to one connector for the 2.4 GHz band and another for the 5 GHz band? And if so, what would happen?
This is because, reading the Meraki antenna documentation, it describes that a single antenna must only connect to the connectors for one band, either 2.4 GHz or 5 GHz, but not both. The section that describes this installation method is “How Do I Attach an Antenna to Outdoor APs?” and the documentation link is:

https://documentation.meraki.com/MR/Other_Topics/Frequently_Asked_Questions_regarding_Cisco_Meraki_A...

[Ryan_Miles]

The doc you mentioned explains it.

https://documentation.meraki.com/MR/Other_Topics/Frequently_Asked_Questions_regarding_Cisco_Meraki_A...

"Meraki outdoor sector and patch antennas have two integrated cables and N connectors. Both of these connectors must be attached to the same radio. This is important for 2x2:2 APs such as MR74 and MR76. A single sector/patch antenna should not be attached to both the top and bottom of the access point, which would have that antenna connected to two different radios. When looking at these 2x2:2 access points, each radio has two ports next to each other on the same side of the AP. For example, if an MR76 has two ANT-25 patch antennas properly connected, even though they are dual band antennas, one ANT-25 will have both pigtail cables connected to the 2.4GHz radio and the other ANT-25 will be connected to the two 5GHz radio ports."

[PhilipDAth]

>And if so, what would happen?

I don't know.  I would be scared of damaging the radios.  You are directly connecting the output of one radio to other.

[JosueRuiz]

Will there be documentation that addresses the potential risks of connecting an antenna to both bands?

[Ryan_Miles · Accepted solution]

The AP needs two antennas - one attached to each radio/set of antenna ports. 

[JosueRuiz]

Thanks for the help. This has resolved my concerns.