"Cecil Moore" wrote
All of the boundary test conditions given in Corum's
IEEE white paper are satisfied by a 75m bugcatcher
loading coil. There is no reason to believe that
the underlying principles of physics do not apply.
In fact, the diagram of the 1/4WL resonant system
looks exactly like a base loading coil, stinger,
and top hat as is used for 75m mobile operation.
_____________

Cecil,

Do you believe that a 75m mobile antenna system using an artificially
resonant (as in bugcatcher-loaded), electrically short whip produces the
same elevation pattern and groundwave field strength at 1 km as an unloaded
1/4-wave vertical monopole for 75m with the same applied power using a good,
buried radial r-f ground (say, 2 ohms or less)?

RF

Richard Fry wrote:
Do you believe that a 75m mobile antenna system using an artificially
resonant (as in bugcatcher-loaded), electrically short whip produces the
same elevation pattern and groundwave field strength at 1 km as an unloaded
1/4-wave vertical monopole for 75m with the same applied power using a good,
buried radial r-f ground (say, 2 ohms or less)?

No, the radiation pattern depends upon the *physical*
length. The feedpoint impedance depends upon the
*electrical* length. (I haven't said anything about
the radiation pattern in my postings.) Unless the
antenna is "full-sized", the physical length and
electrical length are different.

There is a free lossless phase shift between the top
of a loading coil and the stinger. There's obviously
zero radiation from that dimensionless point. That 40
electrical degrees of antenna is not physically there
so it cannot radiate.
--
73, Cecil http://www.w5dxp.com