I’m using two Wouxun G1000- Plus radios for my repeater setup with a duplexer. What I would like to do is increase my output by using 2 antennas. What is the minimum distances between the antennas? Both will be at 40ft.
There is a useful calculator here.
Vertical isolation calculator
If you start with one wavelength, and then increase the distance incrementally, you can see the point where you stop getting big changes. I prefer receive on top.