How to avoid interference when installing two wireless-bridges on the same mast?

Question

WiFi

There is a main wi-fi bridge built on "Ubiquiti RocketDish 5G" antennas + "Mikrotik NetMetal 5" access point, shoot at a distance of 14 km and pump 400 Mbps, in both directions. Frequency 5940, protocol nv2.
But after installing an additional bridge, built on the "Ubiquiti NanoBridge M5" and firing in the other direction at a frequency of 5665, the reception speed of the main one dropped to 300 Mbps. I assume that the second bridge creates interference, the search for frequencies does nothing. When I turn off the second bridge, the throughput of the first bridge returns to 400 Mbps.
Please tell me how to get rid of the noise.
Bridge enabled

Bridge disabled

Answer 1

Perhaps you are not getting enough food. Most likely, the near zone of radiation creates interference. Therefore, separate the antennas with a shielding partition. Also, spread as much as possible in frequencies, make sure that the alignment is correct when you turn on the antennas. Perhaps the feeders interfere with each other, or the network bandwidth is not enough.
In any case, you need to check each element in the chain.