Richard Harrison wrote:
Walter Maxwell wrote:
"Dan, a short represents zero impedance, thus if resistance is less than
Zo with zero reactance, the phase of the reflection coefficient is 180
degrees. Conversely, an open represents an infinite impedance thus if
the impedance is greater than Zo, the reflection coefficient is zero
degrees,"

Succinctly and well stated.

Graphics of the voltage vectors (phasors) along open-circuited and
high-impedance terminated transmission lines are gicen by Terman on page
91 of his 1955 opus. At the high-resistance termination point, it is
seen that the incindent and reflected voltages are in-phase and thus
add.

My 15th edition of The ARRL Antenna Book has those
phasor diagrams, Fig 8 and Fig 9, on page 24-5. Since
Walter Maxwell was a contributor, I'll bet that those
are Walt's phasor diagrams.
--
73, Cecil http://www.w5dxp.com