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Old September 15th 09, 08:47 PM posted to rec.radio.amateur.antenna
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Default Spherical radiation pattern


"Szczepan Białek" wrote in message
...

- - moderate-sized snip --


You are right. Few mans ago I was writting that Gauss law is enough to
do antennas. Of course not this for magnetism.
Static charge produces static electric field and pulsed (in the end of
the antena) alternating field. It is radiation. For me there are ether
vaves. For Art photons or something else.
S*



Which one of Gauss's two laws?

Above is wrote: "Of course not this for magnetism". The electric one.
S*



Well that's not correct - you can't 'do antennas' with Guass's law for
electric field alone. You've already been told that radiation requires
acceleration and deceleration of charge, that is, alternating current, which
creates a magnetic field and the strength of this field is related to the
amplitude of the current by Ampere's (circuital) law, which is the basis for
one of Maxwell's equations.

In fact, it takes current (i.e. movement of charge) to create potential
differences so, even if you are encumbered with 'electrostatic blinkers',
the current comes first and is more fundamental.

Chris


 
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