@Baenz Mia it definitely a repeater? It says it's a dual band 4G router on Argos? Would a 4G router increase signal strength then? If so what would you recommend?

I'm using the TP LINK AC750 dual band 4G router at my farm and it gets about 4mbps download speeds. When I connect up my Poynting XPOL2 antenna my signal drops to about 2mbps download. Why is this?...