WIFI Antenna Output Thru Coax

I haven't purchased anything yet. Still in the figuring out stage. I did find a directional antenna with a mini uhf connector that I can adapt to the satellite connector. I do have access to the cable on the inside of the trailer. Are there any markings on the cable itself to indicate whether it's high frequency or not? The cable goes up through the wall and across the ceiling to the bedroom wall. I'm pretty sure there are no splitters. The cable connection has several places where it is linked or split, but not the satellite. Is the frequency problem with the cable, or the connector? I have access to that as well. If I have to drill a hole and install a new connector, I would put the repeater by the connection, under the bottom bunk . If I can use the satellite connection, I would put the repeater up behind the TV, which would provide better coverage in the trailer. Thanks for the information.