Yeah, that is either a point to point network connection, WiFi, or localized cellular. Based on the shape it looks more directional than a typical WiFi so I am betting it is point to point. Kind of small for microwave so it could be 802.11 point to point. They may not have a good way to get the WAN over to the building.
Regardless, puttig things infront of it would reduce the power so not a good idea.