Stuart Rohre <rohre@arlut.utexas.edu> wrote:
> ... an antenna radiates because the current in it reaches a discontinuity
> (end of the wire),
> or the current changes direction.
This is incorrect and misleading.
Whenever an AC current flows on a wire,
there is an accompanying and inseparable
AC electromagnetic field surrounding the wire.
And the said AC field propagates in all directions.
It is as simple as that.
No special conditions are needed, and one doesn't have
to do anything special in order to provoke radiation.
"Radiation" would be easier to comprehend if we
stopped calling it "radiation", and started calling
it "disturbance propagation", what it actually is.
73,
Sinisa YT1NT, VE3EA
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