David 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.
If feeder is coax, is there a standing wave on coax?

Not if the SWR is 1:1 on the coax.

If feeder is open wire feeder, is there a standing wave on the feeder?

Not if the SWR is 1:1 on the open-wire feeder.
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73, Cecil, w5dxp.com