"Richard Fry"
...
On Sep 17, 12:15 pm, Szczepan Bia³ek wrote:
If antenna has only one source it is omnidirectional. If two or more is
directional because the waves from different sources interfere.

More study is needed on your part, S*. Consult the textbooks of the
authors that already have been listed, and quoted here.

Your unproven, personal opinions are not sufficient to support some of
the statements you post-- which accounts for the "negative" comments
responding to them.

I wrote: "Do not send me to librery".

Every single real-world antenna in existence has more than one source
along its length that contributes to its radiation pattern, and
therefore has some directionality.

I wrote" "Pressure pulse travel" I means that in monopole antena is one
strong source on the and and traveling source "along its length" .

Your study and accurate understanding of the works of the authors
mentioned will prove this.

Tell me who is right: Helmholtz or Heaviside?
S*