Art wrote:
"Surprises me that nobody has made reference to dissimilar abtennas as
possible contributors----."

Yes. The original questioner, Al Lorona did not rule out separate
antennas for transmission and reception as a possible cause of "one way
propagation".

Art has ridiculed books as sources of answers for questions such as
this, but often they give reliable answers. Kraus writes on page 252 of
his 1950 edition of "Antennas":
"If an emf is applied at the terminals of an antenna A and the current
measured at the terminals of another antenna B, then an equal current
(in both amplitude and phase) will be obtained at the terminals of
antenna A if the same emf is applied to the terminals of antenna B, It
is assumed that the emfs are of the same frequency and that the medium
is linear, passive, and also isotropic."

I think reciprocity is why Al doesn`t find sites about one way
propagation.

Best regards, Richard Harrison, KB5WZI