U¿ytkownik "Cecil Moore" napisa³ w wiadomo¶ci
...
Szczepan Bia³ek wrote:
So now I know what I want. Do you agree with Dr.?

The superposition of coherent waves is a linear function.
Therefore, there is no way for the superposition process
itself to produce harmonics.

But the dipole has the two independent sources on the two ends. The waves
from them are "coupled". We can say "polarised" but it not means that radio
waves are tranversal.

For frequency doubling to exist, there must be a nonlinear
process. The question is: Does any nonlinear process exist
between the linear transmitting antenna and the linear
receiving antenna?

Forget nonlinear process. In emmiting antenna the one current cycle produce
the two spherical waves from the ends (of course not in phase). So equipment
is "polarised" not the waves.
It is most interesting that at very short distances the polarisation works
and the frequency is not twice more.

I once heard a pile of tin cans talking to me. Turns out
some rusted junction in the pile of cans was detecting
the FM from the local radio station. That was a non-linear
process. Lucille Ball is reported to have picked up Japanese
CW signals through the fillings in her teeth, again a non-
linear process.

All are like coherer. The first detector of the radio waves.
S*