Omnia WiFi 6 antennas and diplexers

We’re considering buying a few Omnia Wifi 6 ( RTROM02-FCC ) routers. The images on discomp are a bit misleading, as the router has 4 antennas installed, but only 2 of them are connected on the mainboard photo.

What is the actual count of diplexers installed? What is the number of ufl pigtails inside, and which ones lead where?

And, one more question, is there some detailed spec of the antennas? Do they support MU-MIMO (I actually don’t know what that would mean, but I’ve seen some wifi antennas explicitly stating they do support MIMO, so I assume there are some that do not support it)?

Does the AsiaRF card come with a heatsink, or is it distributed as shown in the photo?

The trick is, as you can see on the overall picture of Turris Omnia, two antennas are on the sides. So they come of with the top cover. Those antennas do not have any diplexers, total number of diplexers is two - those two that you can see on the picture - so the 5GHz AX card can share two antennas with 2.4 GHz card. There is no heatsink included, not sure what photo are you talking about. There is a heatsink on the CPU.

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Thanks. And what about the antenna types? Are they sufficient to not cripple the MU-MIMO capability of the AsiaRF card?

They are the standard Omnia antennas, which is 2,4/5 GHz capable. They work great and without any degradation together with all cards that are supported by Turris team.

Outcome of tests around heatsinks and AsiaRF card was that normal heatsinks do not make any difference - cards reach w/ and w/o heatsink temperature >100° C.

modding options

What you can do is install the alloy-block initially meant for LTE-card and add some fan to cool the chassis, but that will generate noise which is normally not wanted side effect. But that’s advanced “off-label use” :wink: / modding anyways (which can cool the card down below 60° C and as a positive side effect also lower CPU-temperatures).

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