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.

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.

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

RF