"Dave Platt" napisał w wiadomości
...
Since it's a loop antenna, it has no "ends"... no points at which
electrons could "fly off".
A loop antena have the antinodes. The points at which electrons could "fly
off".
See Fig. 2:
http://www.antiquewireless.org/otb/lodge1102.htm
The net current flow going up the feedline
to the antenna will be zero, at all points - a positive current on one
side of the feedline will be exactly balanced by a negative current on
the other side of the feedline. There are no "excess" electrons or
charge flowing in either direction.
""A further feature of the structure of negative coronas is that as the
electrons drift outwards, they encounter neutral molecules and,
withelectronegative molecules (such as oxygen and water vapor), combine to
produce negative ions. These negative ions are then attracted to the
positive uncurved electrode, completing the 'circuit'.". From: Negative
coronas. Mechanism.
http://en.wikipedia.org/wiki/Corona_...gative_coronas
In the each antenna is the excess/deficit of electrons and "charge flowing
in either direction."
But the negative corona and the positive corona are not simmetrical.
At transmitting you have the deficit and at receiving the excess.
Without the earth the static build up and radio stop working.
You can even insulate the antenna wires, if you wish.
Can you measure the static electricity?
It will transmit just fine, with no connection at all to "ground".
Disconnect the transmitter, install a receiver of a similar "balanced
and isolated" design, and it'll receive just as well... again, with no
connection to "ground".
You will transmit just fine if you have the ground/chassis/counterpoise.
S*