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Old January 11th 09, 09:47 PM posted to rec.radio.amateur.antenna
Richard Fry Richard Fry is offline
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First recorded activity by RadioBanter: Jun 2006
Posts: 440
Default Does NEC-2 model wires as solid or hollow?

On Jan 11, 3:05*pm, Art Unwin wrote:
Members of the group oppose the idea of sloping antennas but without
reason. It is certainly a good place to start. To me best results is
determined by your needs whether it is total gain, polarity...


You mean polarization, no doubt, which is not the same as polarity.

Note Kraus stated a case where the angle of the radiator is best at
about 14 degrees and you trust him.


Please provide a verifiable reference to this in anything Kraus wrote.

The graph seems o.k. depending on what your desire was. What ever your
desire is you can tilt things while keeping the radiator resonant to
determine the finality of the debate.


N.B., Art, that...

(1) a monopole radiator does not need to be SELF resonant to be
intrinsically efficient. Fractional wavelength, vertical monopoles as
short as 45 degrees radiate nearly as efficiently as longer ones that
are self-resonant, as long each is Z-matched to the source driving
them.

(2) a vertical monopole of 0.625 wavelengths and less generates its
maximum relative field in the horizontal plane, regardless of the
ground conditions it has.

... by use of the computer program you have a modicom of trust
in them, which is encouraging.


More than a modicum. See the examples on my website http://rfry.org
for examples of my NEC studies going back many years.

RF