WIFI Antenna Output Thru Coax

I think you're going to run into problems with that approach because of the frequency range consumer wireless operates at (2.4 GHz and 5 GHz). The typical RV coaxial wiring often seems to use 1 GHz F connectors and has hidden splitters in the walls, neither of which will work. The satellite connection *might* be a direct line with high frequency connectors, but that is not easily tested in advance without buying an expensive meter or the wireless equipment you would use. Something like this would be where I'd start my hardware research: https://www.ubnt.com/unifi/unifi-ap-outdoor/. You should be able to get adapters to convert what looks like SMA connectors to the trailer's F connector, but I'm unsure of how the performance will be.

I actually just installed a setup like this on our trailer this weekend. I installed:
(1) External 3 GHz F-connector port
(1) External RJ-45 port
(1) Dual rocker switch
(1) PoE injector (attached to one of the switches)
(1) weBoost 4G-X RV with 12V hardwiring (attached to the other switch)
(2) Dual 2.1 amp USB ports

The coax-based portions are for attaching a Yagi antenna for the weBoost where the ethernet-based portions are for a Ubiquiti NanoStation M2 to extend the WiFi range significantly. The extra USB ports are to power the local router and AT&T ZTE Mobley.

Both the NanoStation and Yagi antenna are attached to a telescopic mast that will be installed where needed via suction cups on the side of the trailer. I did not want to permanently install this because I wanted the option to both reposition it if the overhead was obstructed by trees and to allow for it to be much higher than the trailer roof.

I have photos that I can append from a computer if wanted (on an iPad at the moment).

here is a explanation of why not to use tv or satellite coax cable for wifi

So you want to transport that 2.5 GHz (or even 5 GHz ?) Wifi signal over TV COAX cable ?

Indeed to the non-RF people you'd just think that would work. And it does BUT there will be almost no signal coming through that cable.

The Wifi signal will be attenuated so much in that COAX cable that it will defeat the whole purpose of having an antenna on the roof. The same antenna directly on the router might even get better coverage.

Why is that ?

TV COAX cables are not designed for 2.5 GHz signals, TV signals go up to 1 GHz and even at that frequency you can expect a lot of attenuation.

TV COAX cables usually have a characteristic impedance of 75 ohms, Wifi antennas routers etc. all use 50 ohms. There are no exceptions to that.

So no, in practice this will not work at all.

SKip the sat connection... Instead look for existing holes. IN a Motor home there are holes likely plugged with expanding foam. in the firewall.

On both a motor home and trailer there are holes where wires and plumbing go in and out.. these will be along the sides. (one is near the water pump) Just exit via that hole and get into the electrical run compartment to compartment and finally out and up the ladder.

I drilled a hole for the RJ45 cable for my Ubiquiti Bullet. It's been there for 5 years without problem.

The Bullet is powered by PoE - I don't know how you could do that with coax.

What kind of antenna are you installing?

Since no one uses hard wired phone lines anymore, I removed the guts for a phone hookup on the outer skin and replaced it with a coax connector, works great for my satellite dish hookup, just run the wires on the inside, maybe you could do something like that

use cat6 and rj45 connectors, this way you can use an outdoor access point vs a passive antenna, much better reception and also future proofed.

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.

The satellite TV coax cable itself is not appropriate for a WiFi antenna connection. The connectors probably also are not suitable, but that's a moot point. Just the fact that adapters exist to plug one into the other does not change the suitability.

Short answer: it won't work to use the existing connection.

The trailer is small enough that I doubt it makes much difference where the repeater is inside the trailer; you should get decent reception everywhere inside even with it off in a corner or something.

Direct broadcast satellite dishes and over-the-air HDTV antennas require 75 Ohm Coaxial Cable to ensure that all of the digital channels transfer down the cable with the lowest loss and distortion possible. so your satellite cable is the wrong Impedance for wifi routers it should be 50 ohm cable and connectors or a mismatch and signal loss is the result. one crucial point in regards to coaxial cables. The Impedance of the various devices being connected as well as the Coaxial Cable itself must match. So if you are, for instance, connecting a 75 Ohm connection to the coaxial cable must also be 75 Ohm AND the connectors on the coaxial cable must be 75 Ohm in Impedance. Every single time you have a mismatch in impedance, say between a 50 Ohm Coaxial Cable and a 75 Ohm Coaxial Connector a standing wave develops. A standing wave is a signal reflection that is essentially wasted. Every time a 50 and 75 Ohm Impedance mismatch occurs, about 5% of the signal is lost. These losses add up and can eventually degrade the signal to the point that it is unrecoverable or distorted. not saying it will not work at all but all wifi antenna cables should always be as short as possible or the correct cable used for the length you are extending it or huge signal loss is the result. you could try it but don't spend a lot doing it.

this is the type of wifi repeater system that works good there is one made by Winegard and others that are more expensive. wifi repeater