U¿ytkownik "Rob" napisa³ w wiadomo¶ci
...
Szczepan Bialek wrote:
The radial connected with the shield of the coax is the ground.

No Szczepan!
You keep saying that, but it is wrong.

Not me but Wiki:
"The monopole antenna was invented in 1895 by radio pioneer Guglielmo
Marconi, who discovered if he attached one terminal of his transmitter to a
wire suspended in the air and the other to the Earth, he could transmit for
longer distances. For this reason it is sometimes called a Marconi antenna.
Common types of monopole antenna are the whip, rubber ducky, helical, random
wire, inverted-L and T-antenna, mast radiator, and ground plane antennas."

When a coax shield is grounded at one end, and after a considerable
length of coax it is connected at the dipole, the shield at that
end is no longer ground.

Especially when the length of the coax is about a quarter wavelength,
it will have nothing to do with ground.

The "ground plane antenna" is also the monopole:
"To function as a ground plane, the conducting surface must be at least a
quarter of the wavelength (?/4) of the radio waves in size. In lower
frequency antennas, such as the mast radiators used for broadcast antennas,
the Earth itself (or a body of water such as a salt marsh or ocean) is used
as a ground plane. For higher frequency antennas, in the VHF or UHF range,
the ground plane can be smaller, and metal disks, screens or wires are used
as ground planes".

For radioamateurs the one wire is enough.
The dipole is useless for them. They want to "transmit for longer
distances".

But some radioameteurs use the receiving dipole to find the source of
radiation.
S*