On Wed, 8 May 2002, Tom Rauch wrote:
> > For horizontal dipoles oriented E-W, power coupling in North
> > America and Europe is still very unfavorable to the north, as
> > shown below for central locations in those continents:
> >
> > W0 DL
> > (dB) (dB)
> >
> > N -24.0 -24.0
> > E-W -6.6 -5.3
> > S -4.7 -4.1
> >
> > So verticals would be the antenna of choice in NA and EU.
>
> Are you saying the signal from a horizontal dipole at my location
> oriented E-W (broadside N/S) would be 24 dB down due north of me into
> Ohio or Ontario compared to a vertically polarized signal with the
> same ERP?
Tom,
No, that is not what I said nor meant; there was no mention of a
vertically polarized signal with the same ERP.
The -24 dB insertion loss or power coupling is the result of a
horizontally polarized signal from a dipole encountering steep geomagnetic
field lines. It is the dipole's signal that is attenuated. No other
antenna or polarization is involved in the calculation and I am at a loss
as to how you brought one into the discussion as I made no mention of one
in that section of my remarks.
73,
Bob, NM7M
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