On Sep 14, 1:56*pm, "christofire" wrote:
"Szczepan Bia³ek" wrote in message

...



"Richard Fry" wrote
....

- - small snip --



QUOTE
A radio antenna may be defined as the structure associated with the
region of transition between a guided wave and a free-space wave, or
vice-versa. *Antennas convert electrons to photons, or vice-versa.

Regardless of antenna type, all involve the same basic principle that
radiation is produced by accelerated (or decelerated) charge. *The
basic equation of radiation may be expressed simply as:

IL = Qv * (A m s^-1)

where

I = time-changing current, A s^-1
L = length of current element, m
Q = charge, C
v = time change of velocity which equals the acceleration of the
charge, m s^-2

Thus, time-changing current radiates and accelerated charge radiates.

In which parts of antenna the charges acclerate?
S*

In all the parts that carry current, of course. *Isn't that obvious?

Incidentally, who is A* ? ... the person who wrote:

* * Does one wave has many polarizations, or one antenna has many
polarizations?
* * Which one: transmitter or receiver? Could you teach me?
* * A*

Chris

Could mean that Art and S are the same person, one does seem to appear
when the other disappears.

Jimmie