Szczepan Bialek wrote:

"Rob" napisa? w wiadomo?ci
...
Szczepan Bialek wrote:
From Maxwell's time all circuits are closed. So sometimes the current
must
flow in the air. Of course sometimes is enough if only part flows in the
air. It is the leakage.
At HF the leakage is rather large.

But today we know that this is not true.
"A great deal of analytical and experimental work has been done over the
past 100 years on the design and performance of ground systems for
verticals. "
And in summary: "Depending on the character of the soil, it is possible
there may be some increase in soil conductivity as we go up in frequency
which might compensate a bit. "

"The purpose of the radial system is to divert current from the soil into
the radial conductors which have very low loss compared to soil. We can
calculate the current division between a radial system and the soil ".From:
http://www.kkn.net/dayton2004/HF_ver...6LF_Dayton.pdf

For me the current between the radial and soil (or air) is the leakage:

Nope, you have no clue what is actually happening.

Is at HF the leakage rather large?

This is a nonsense question based on a total lack of understading of
what is really happening.