sci.physics

"Bill Miller" wrote
news:oR% $ @bgtnsc04-news.ops. ...
>
> "Szczepan Bia³ek"
>> If electron gas is oscillating at the ends of the antena appear
>> periodically huge charges. It must something radiate.
>
> Your conclusion would be accurate IF your postulate were correct. However,
> in most antennas, the maximum radiation intensity occurs near locations of
> maximum current and MINIMUM voltage. In fact, a theoretical dipole has
> zero radiation off the ends, and practical dipoles have a ratio of
> broadside to end radiation on the order of 20 dB or more..

Antenas are the ends of the "current carrying wires". It it not easy to
analyze it. Here are many very easy experiments:
/~snorkelf/Longitudinal/

You can use the "gas analogy" to explain themS*


> HOWEVER a friend of mine has built a couple of prototypes of what he has
> called a "Teslavert." This type of antenna is basically an externally
> driven, HF version of a Tesla Coil, and most of the radiation appears to
> come from the ball; not the rest of the structure. I've developed a theory
> associated with this.

Is it the "gas" theory? If not, it may be wrong.

For details, see various articles published on
> . The antenna also *appears* to violate (or at least
> challenge) the so-called Chu limit.
>
> Before someone challenges ME on that, please accept two points. First, my
> friend did not have the time and resources to rigorously test it (and my
> prototype is still mostly on paper.) Second, Mother Nature routinely
> violates the Chu limit. It's just us dumb humans that don't know how to do
> it!

I only suggest the "gas analogy"
>
> See, for example,
>
> /grimes/publications/ for an example
>
> of a natural "antenna" that is 500 times smaller than conventional
> "antennas."

I will.
S*
>