My ptz outdoor camera is mounted pretty much at the end range of the wireless router signal. Sometimes it connects good and other times not so good. If I could connect the antenna itself at the end of a 20' cable and the other end to the camera, that seems like it would solve the problem by getting the antenna that much closer to the wireless router.
IMO - if you re going to run a 20 foot cable, why not just get the POE kit and run a 25 foot cable. I see even if you set up the camera the with the wireless set up...and you have to reset the camera ( connect to the router ) , you re going have to either take it down or run a 25 foot cable to the camera to start fresh.
I had my cam wirelessly and its less than 25 feet from my router hanging outside. and i thought of LOSS OF ELECTRIC, NY has had black outs. I trip the circuit breaker running a heater NO POWER TO THE CAMERA. My dog pulls out the power cord NO POWER AGAIN. if i had to reconnect, i still have to connect my router to the camera first.. POE kit provides me with the power/router connection and when i add video and outside speaker... my set up makes it very easy.. after all .. i am 55 an disable.