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Old May 7th 10, 08:49 AM posted to rec.radio.amateur.antenna
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Posts: 707
Default What exactly is radio


"K1TTT" wrote
...
On May 6, 8:00 am, "Szczepan Bialek" wrote:
"K1TTT"
...
On May 3, 7:25 am, "Szczepan Bialek" wrote:


Radio waves from the dipole are polarized. Does it mean that light is

emitted by a dipoles?


sure, why not? but polarized waves can be emitted from other things

also.

We can shield the one end of the dipole.


no you can't.


A whip antennas on a car is not such?


no, the other half of the dipole is the body of the car itself.


Have you ever seen the dipole which one end is without a cap and the other
with the huge cap (the body of the car?
The body is rather a mirror for the monopole.

Why the dipoles exhibit the directional pattern?


because they do, its well measured and accurately described in the

equations.

Are the measured and the calculated from the equations in agreement?


yes, to within many, many decimal places... if they did not agree to

within the limits of measurement then someone would have had to make a
new theory to explain the difference.

No such need. For the radio waves apply all knowledge for the acoustic
waves.
The monopole works like the Kundt's tube. The dipole like the two.
The directional pattern is the same for two loudspeakers like for the
dipole.
S*


 
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