http://www.sibeam.com/en/Blogs/2015/November/ShrinkingFootprint.aspx
At the end of page sibeam claims to use RB912 someone has more info?
I am not sure this is for real.
It states that this is a mock-up, not a real/production device.
To illustrate this, we have built a > physical mock-up > of a metro Wi-Fi access point that includes 60 GHz wireless backhaul.