Antonio Vernucci wrote:
The extra power measured at the receiver is obviously "created" at the
expense of power taken away from other regions of the space (according
to the transmit antenna pattern).

Too fundamental to deserve further discussions!

Almost everyone knows what occurs in free space -
constructive interference in the direction of
greater gain and destructive interference in the
direction of lesser gain. But my posting was not
about free space. I thank you for your input so
far but please now extend those EM wave concepts
to transmission lines.

Everyone doesn't agree that constructive and
destructive interference also happens at a Z0-
match point in a transmission line with reflections.
That is the topic that needs "further discussions".

Just as constructive interference functions to
increase antenna gain in one direction while
destructive interference functions to decrease
antenna gain in another direction, in a transmission
line at a Z0-match point, constructive interference
functions to increase the energy flow toward the
load while destructive interference functions to
decrease the energy flow toward the source.

Antonio, please don't bow out now. You are apparently
one of the few posters who fully understands interference.
--
73, Cecil http://www.w5dxp.com