I'm not quite sure what forum to put this in. It's related to mounting a cellular antenna but it's not a technology question. Sorry if this is a bit of a long ramble.
New RVer here with a 2017 Minnie Winnie 31K. Among the many tasks we need to do before setting off with some cats is setting up good cellular data. I'm quite competent about the technical side of this but the thought of mounting an antenna and getting the cables in etc is almost keeping me awake at night. It's not the sort of thing I want to make a mess of and obviously want to drill the minimum number of holes.
I'd appreciate any comments and general sanity check on what I'm planning.
I have one of these Poynting "shark fin" type MIMO antennas that I want to mount on the roof. https://poynting.tech/antennas-and-a...nas/mimo-3-15/
Ideally, for performance, it needs to sit on a metal surface. With a fiberglass roof, this obviously means some sort of metal plate. According the manufacturer's instructions, the metal needs to be a minimum of 400 x 400 mm or about 16 x 16 in. Opinions vary on the necessity of it. It might not make a huge difference but, knowing what I do about antennas etc from being into ham radio, I'd like to provide that if I possibly can.
I've looked long and hard to find a good position. I think near the back on the left (i.e., not the ladder side) a couple of feet diagonally in from the corner. There's nothing else there, it's far away from the interfering A/C unit etc and I have a convenient DC power outlet for the router in the bedroom below.
It can mount two ways. One way is to have it sit over a central hole. It has a plastic spigot that goes through the hole with a nut on the inside. The cable goes vertically down through the spigot. I don't think I can realistically use this method. I don't want to have to deal with the space between the ceiling and the roof so any hole needs to come down into a cupboard.
The other way is to mount it on a flat surface with no hole. The cable goes horizontally out the back. Here's my plan. Please tell me of I'm suggesting something crazy here.
I get a sheet of galvanized steel. Probably this: https://www.amazon.com/M-D-Building-.../dp/B000IKM1Y0
It's 28 gauge or 1/64 inch thick which is thin enough to cut with tin snips. I'd cut it to 16 x 16 or maybe a little bigger. I would stick it down with 3M VHB.
The antenna has a magnetic mount option. They're six little "buttons" which are strong magnets. I'd use that to hold the antenna on the plate.
For the cable, I would drill a hole down into one of the cupboards at the back above the bed. I would follow what I saw in a video which is to mount a plastic box over a hole and have holes in the side of the box for a cable to go in and then down. That will give me the future opportunity to pass other cables in through the box without more holes in the roof.
Does that sound doable? I don't know how strong the VHB is and if it is likely to damage the roof. The antenna is quite light and when mounted pointing forward, it doesn't have much wind resistance.
Maybe a silly question. The salesperson mentioned the word "rubber" when talking about the roof but it is fiberglass isn't it?