I need to use external grid antenna (28 dB) to be connected to the access point on each building. I've used similar arrangement to connect two buildings 600 meters apart using cheaper equipments some 6 years ago. The connection worked smoothly for more than a year.
My project is to make the similar connection but using these tp-link products. There are equipments that don't use MIMO (i.e withe single antenna). My question to the experienced personnel is that is it better to use the equipments with native single antenna or to adopt the new parts of MIMO (using only one of their antenna for external outdoor grid)?