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Old September 21st 09, 08:13 PM posted to rec.radio.amateur.antenna
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Default Standing waves


"Szczepan Białek" wrote in message
...

"Cecil Moore" wrote
...
Richard Fry wrote:
At the top of a monopole, and at the ends
of a dipole the net current is almost zero -- so those locations
generate very little of the total EM radiation from these antennas.


Since the forward current and reflected current are equal
in magnitude and opposite in phase at the ends, they act
like transmission line currents and the magnetic fields
cancel at the ends. They are in phase at the feedpoint -
hence the maximum radiation at that point.


EM means elecro- magnetic. Radiation can start from any of them, See what
Richard Harrison wrote: "At the open circuited ends of a resonant antenna
there is almost double
the forward voltage but zero total current due to cancellation of the
dorward and reflected currents at the open circuit. At the open circuit
in the wire, all the energy in the wave is transferred to the electric
field."
S*



See my post earlier in this thread. You are misinterpreting what Richard
Harrison wrote to suit your own, incorrect, made-up version of how antennas
work.

Please think on this, Szczepan Białek: the likelihood that your personal
version of the physics is correct is vanishingly small - when it conflicts
with the version everyone else (except perhaps Art Unwin) appears to
understand from their education, which is derived from the basis for
antennas that have been in use for more than 100 years.

Chris


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