[Antennaware] coax monopoles and more

[K7GCO@aol.com]

In a message dated 7/23/2002 4:02:45 AM Pacific Daylight Time, 
n4zr@contesting.com writes:
> 
> At 12:43 PM 7/23/02 +0200, Maurizio Panicara wrote:
> >Independently by its peculiar high angle radiation, not every contact 
> needs
> >low angle radiation, an orizontal antenna close to a real ground has large
> >losses that seriosly affect the overall efficiency.
> >Any modeling software I tried seems to under estimate those real losses.
> 
> Which raises again the question of using stacked dipoles for an NVIS 
> antenna, with the upper one fed and the lower one used as a 
> reflector.  Hypothetically, wouldn't that improve the loss situation, if 
> the reflector was some distance above the ground surface?
> 
> 73, Pete N4ZR
> Check out the World HF
> Contest Station Database at
> www.pvrc.org
> 
Reflectors underneath do improve performance of high angle antennas.  I've 
used them under horizontal quads and installed quad reflectors on the ground 
of progressively difference sizes with obvious beneficial results.  I will 
have a QTH where I can install one installation with and one without a 
reflector or ground radials of the right orienation and compare--side by 
side.  
     One comparative test is is worth 1000 opinions and soft ware 
predictions.  (Old K7GCO Axoim)


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