Hello TNS,
Thanks for your input, i hope to read more of your opinions here 🙂 It’s always great to mix different perspectives.
Just one thing though, in your geometric formula, you forgot to take into account the vertical half beam power width of the antenna.
“-3dB” point = arctg(h/l) + VHPBW/2
with ( h=12,l=100 and VHBW = 28/2 or 55/2 … )