On May 17, 11:27 am, "David" nospam@nospam wrote:
Standard antennas often have a standing wave on them e.g. dipole or
quarterwave vertical.

Antenna is resonant and presenting good impedance. SWR is 1:1.
so it is either 36 or 72 ohms

If feeder is coax, is there a standing wave on coax?
50 ohm coax = yes

If feeder is open wire feeder, is there a standing wave on the feeder?
not 50 ohm twinline = yes