Ok, so trying to summarize your answers, it seems that

- Electric and Magnetic fields, effectively, go together, but
their ratio may vary, especially at the antenna's near field.

- Cecil Moore says in free space this ratio is the 377 ohms
characteristic impedance. I don't know how to mathematically
check this, but seems reasonable to me.

- It is clear that polarization is an important factor in
rejecting noise. I never doubted that.

So, apparently, it would be clear that

- a reception system capable of discriminating electric/magnetic
fields should be able to reduce unwanted noise from near sources

and

-adding the capability to discriminate different polarizations
would also help with noise from both near and far sources.

Correct?

73,
EA3FYA - Toni