some weeks ago I saw a presentation for an access point in the market with a 5 GHz Interface and a second Interface were you can configure it to be 2.4GHz or 5 GHz. The manufacturer was like "in future wifi will all be 5 Ghz and 2.4 GHz is legacy and so its more future proof".
Customers will still have the demand for 2.4 GHz for the next years. But since more clients change to 5 GHz, the lower coverage range of 5 GHz and only 3 or 4 nonoverlapping 2.4 GHz channels, many customers have a dense AP network with several APs where 2.4 GHz interface is deactivated.
What if I could use such a unnused interface for RADAR on future APs? Using extra APs for RADAR functionality has the disadvantage of higher cost (extra AP, switch port, cable sockets). With an AP with an 5 Ghz interface and an flexible interface, the customer could use one interface for 5 GHz clients and the other interface can do RADAR operations in 2.4 and 5 GHz (of course alternating).
I know that one needs only one RADAR AP for about five regular APs but having more RADAR-enabled APs would gives more precise location information when triangulating the position of rogue APs. What do you think about it?