I read a lot about different antennas but I still have no clue which type is better for which environment.
I want to install a RAK2245 Raspbery Pi HAT (868 MHz) on a roof (8 m) in a suburban environment.
The nearest other gateway is at least 4 km away so I think a bit of range would be nice.
The RAK comes with a very small iPEX antenna.
Any suggestions for a replacement for reasonable costs? DIY is possible.