At 04:26 AM 11/12/2006, Jim Jarvis wrote:
>K8RI's post on this topic finally prompted me to raise a
>question that's been bothering me for some time.
>
>
>Why is powerline noise vertically polarized? Power lines are
>horizontal. Yes, it's true that there are vertical runs to
>ground, every few poles. But why is the noise assumed to be
>vertically polarized?
Rick Karlquist posted an excellent discussion on this a couple weeks
ago, when was wondering exactly the same thing.
It's not that the noise source is H or V pol, it's that for
ground/surface wave propagation, H pol is strongly attenuated, so
that by the time it gets to your antenna, it's all V pol.
Jim
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