"-.-. --.-" ha scritto nel messaggio
...
Assuming there is no feed line, or also a 1/2 WL feed line (if IIRC 1/2
wl is the line lenght that preserve the phase of my RF wave from generator
to the end of the line...)

Oops. Sorry.
1/2 wl feed line preserve the impedance seen at both ends of the line. Not
sure about phase.

-.-. --.-