[Elecraft] Magnetic Loop question

[Steven Dick]

On Thu, Oct 20, 2016 at 5:04 AM, Vic Rosenthal <k2vco.vic at gmail.com> wrote:
> If it is vertically polarized it has a dipole-like pattern, with sharp nulls. If horizontal, it is more or less omnidirectional.
>

This is sort of incorrect.

The polarization does not matter to radiation pattern.

The physical orientation of the loop matters.   If the plane of the
loop is parallel to the ground, it is omnidirectional.

If the loop is vertically oriented, it can be horizontally or
vertically polarized, but in both cases, there is a sharp null in axis
of the loop.
(Technically, if the loop is parallel to the ground, the null points
at the ground and the sky.)
The vertical  loop can be horizontally polarized by feeding it in the
middle of the top or bottom edges.
It can be vertically polarized by feeding it in the middle of the
vertical edges.

Changing the polarization may change elevation angle, and might affect
ground wave propagated signals, but once it bounces, Faraday rotation
makes polarization irrelevant.