How far out before we see a 5ghz solution with an SFP port? We have some sites on FM towers that can’t go past 10BT ethernet.
use better cable and schielded plugs
Tough cable carrier or some other outdoor SFTP cable, normal FTP cable can aslo fail.
I had once a FTP cable with ferrites arround it that melted into the cable beqause of the radiation.
What is 10BT ethernet?
You might consider the following:
Put the MKtik on the ground, and connect the antenna (dish) b a coax cable. 1/2" Andrew or RFS (which is widely used in mobile 2G and 3G networks). They are very strong, sturdy and easy to connect a grounding kit (you should do it every 10 meters).
The losses are approx 0.15 dB per meter for 2400 MHz. It looks “a lot” but will solve all your problems with putting UTP / FTP cable in the tower. Just compensate by an extra output power, or comensate by a bigger dish.
Besides, if well grounded, the cable will withstand even direct hit by lightning (in my country we have a mast (25 meter) which is hit by lightning several times per month. No outage was recorded in the last 3 years (as of day 1).
You should follow the exact! advise from Andrew or RFS regarding the grounding of the cable. Please check that the tower itself is grounded (from at least two points).
Or you can try something like this http://www.romstal.ro/image/cache/data/products/39TI0130-228x228.JPG . It’s flexible stainless stell tube and is 2$/m in my country.
That steel tube is NOT intended for use outside. It will rust, and will NOT provie good (< 0.1 ohm) resistance. That will even make it worse.
Please copy the existing operators how they do it. Seamingly GSM and UMTS is pretty reliable, even in countries with a lot of FM towers, and lightning.
Seriously this look old but what is 10BT ethernet?
it could be BTU 
Fibre interface is only one part of a possible solution, RF screening of the antenna is also very important.
From experience insertion loss is much higher and at 5Ghz with 1M LMR400 which if I recall correctly data stated 0.3db per meter but was actually on site between 5-6db when bypassed?
as what we know based on our site deployment experience.
time microwave LMR400 in 5Ghz loss is 1 meter = 1dbm.
it’s not like what data sheet said…