Ruckus already has some adaptive technology and beamforming that works with the current 802.11n clients and I read a very good review even though its 3 years old:
»www.tomshardware.com/reviews/bea ··· 0-6.html
The outdoor versions are dual band they have antenna beamforming on 2.4ghz and external N connectors to attach antennas for 5ghz band. they are more likely created for mesh networks with 2.4 connecting clients and 5ghz for backhaul.
Zoneflex 7762-AC is a 802.11n.
After hearing that ruckus video and their document, they are not so excited about 802.11ac for enterprise usage because of occupying too much bandwidth.