q: simultaneous 2.4 and 5.2 GHz

RouterOS Wireless Networking
1

I couldn’t find a solution by searching and the question might also be of interest for others, so I am asking it here:

Many WLAN-routers/IADs allow simultaneous use of WiFi 2.4 and 5.2 GHz. However, only the usual 2 antennas are build on these devices.
Would it be possible to implement that with a RouterBoard (e.g. RB/493)? It is clear that there have to be two radio cards on the RouterBoard each for one frequency in use.
But how could one connect the two radios (= 4 antenna cable) to only 2 antennas? According to my limited understanding of RF, a kind of “mixer” should be possible with appropriate wideband antennas (2.4 and 5.2 GHz).
A little picture is attached.

Or is there a MT supported WiFi radio which could simultaneously use 2.4 and 5.2 GHz?

I hope the objective is understandable and I would appreciate any hints.
TIA
wlan mixer.png

2

Why do you think two radios have to be connected with four cables to 2 antennas? That’s only the case if you use MIMO antennas.

3

Sorry, forgot to make that point clear: yes, MIMO (2x2) should be used.

(Otherwise it would be a bit trivial :wink:

4

its possible (but not advised) to do with a “T splitter”. Ive seen som installations, using T splitter to do just this. (also 2 X 5Ghz band on 1 antenna). U will get “Some” signal.

5

The question marks are called diplexors, they split different frequencies into different lines, commonly used in the coax and satellite world.

6

I have seen it done with old fashon BNC T splitter from old coax network age. :stuck_out_tongue: (And yes. it was working)