Cecil Moore wrote:
"Gene Fuller" wrote:

Phase is gone. Kaput. Vanished. Cannot be recovered. Never to be seen
again.


So how can a signal, devoid of phase, be used to measure the phase
shift through a loading coil?


The only "phase" remaining is the cos (kz) term, which is really an
amplitude description, not a phase.


How can one make a phase measurement using only the amplitude
of a signal?
--
73, Cecil, W5DXP



Cecil,

The phase is uniformly zero, so the phase shift is also zero.

Your messages seem to imply that there is some sort of characteristic
"phase shift" in a loading coil. Ain't so.

In the example of a standing wave antenna the phase shift is zero, both
experimentally and theoretically. (Approximate. Real world conditions
might cause small non-zero shifts.)

If you place this same loading coil in a traveling wave antenna you can
undoubtedly measure some sort of phase shift. (Exact amount left as an
exercise for the student.)

Bottom line: Any characteristic, such as phase, that explicitly depends
on the wave nature of a signal needs to be referenced to that condition,
not some arbitrary setup.

73,
Gene
W4SZ