My setup is with the antenna at some 15-20 meters high, in a tree. I didn’t have a separate pole and I needed to get above the smaller trees and most of the leaves.
I am using a Flightaware antenna (1090MHz) followed by an amplifier with two stage filtering (also 1090MHz). The amp is installed in a sealed box, fed through the coax cable.
The coax is RG6 type, 50 meters long, and ends inside a garage. It feeds two of my setups - a Flightfeeder 1090MHz and a Raspberry Pi.
The results are in my page: https://flightaware.com/adsb/stats/user/SoNic67
A long thread about my setup. Will add soon another antenna… High rise antenna? - #25 by SoNic67