There are all sorts of WiFi antennas you can mount on the tower. But....
At the UHF frequencies the DJI system uses, the coaxial cable that you'll need to connect the controller to the antenna becomes a problem. Normal CB style cable will soak up the signal at UHF frequencies. If you use 30+ feet of CB coaxial cable, much of the signal will be lost by the time it reaches the antenna.
A cable that will work well at 2.4 Ghz gets expensive and is cumbersome to work with. It will be stiff, have a thickness of almost an inch, and cost 4 to 8 dollars a foot.