On Tue, 10 May 2011 16:27:00 -0700 (PDT), walt wrote:

Richard, the point I missed until rereading your post, is that there
is total re-reflection of the reflected wave at either the output of
the correctly-adjusted pi-network, or at the output of the antenna
tuner, not the same mismatch as between the line and the load.

Walt

Hi Walt,

The mismatch, of the reflection wave approaching the transmitter, is
seen at the antenna/tuner connection. Hence we have a reflection
there back to the load.

In regard to solving the transmission line problem where the
mismatched load acts as the source of energy (found in the
reflection); then that energy must travel to meet a matching load
where the load (our transmitter) complete takes it in, or a mismatch
where some energy passes into the load (our transmitter) and some is
reflected according to the conventional mechanics of mis-matching.

I take this step given the evidence of physics and reflection at even
the most specular of surfaces. There is some portion of the energy
that exists within a quarter wave behind/beneath the surface of a
reflector (I am speaking of light, but lower frequencies doesn't alter
the situation). That is to say, there is no infinitesimally thin
boundary through which energy does not pass - even for a perfect
reflector.

In antennas, we call this zone the reactive field.

Hence, the reflection seeing the mismatch of the tuner/tuned output,
finds its way beyond the connector, back into the internals, passing
through transform circuitry.

73's
Richard Clark, KB7QHC