Cecil, W5DXP wrote:
"The ratio of voltage to current at a Zo-match point is Zo."

There is one voltage at a match point produced by the waves arriving
from opposite directions.

There is one power, the power delivered by the transmitter, feeding the
match point. The same power total flows from the match point to the
load. It`s the forward power minus the reflected power.

Though there is but one voltage at the match point, it is clear that the
currents in lines connected at the match are not equal because the Zo`s
of the connected lines are not equal.

We need the reflected power to reconcile our mismatch. The mismatch is a
catalyst that makes a reflection happen.

Say Zo is 150 ohms. 100 watts into Zo is 123.5 volts. 10 watts facing
the 100 watts presents 38.7 volts. Power direction is determined by the
123.5 volt source, not by the 38.7 volt reflection, at the match point.

Best regards, Richard Harrison, KB5WZI