[TowerTalk] Gizmotchy's

Dan Zimmerman N3OX n3ox at n3ox.net
Thu Apr 9 08:52:14 PDT 2009


>
> If it's really both
> horizontally and vertically polarized (not circular)


Anything that's not elliptically/circularly polarized is  just linearly
polarized, and the "ratio" of vertical to horizontal response just depends
on the tilt of the elements with respect to horizontal and vertical.

A yagi rotated 45 degrees from horizontal or vertical using its boom as the
axis is a linearly polarized antenna that responds equally to horizontal and
vertical signals.  But if you have an ionospheric fade going with
polarization rotation of a linearly polarized wave, it's going to work
exactly like any other linearly polarized antenna.  When the incoming wave
is cross polarized with the antenna, you get maximum fading.

So no matter how fancy it gets, if it's not designed for elliptical/circular
polarization, it has *one* tilted polarization.

73
Dan


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