On 26 Jun, 13:34, John Smith I wrote:
Buck wrote:
...
The section below with pictures made a difference. I saw that the
patent is in concept, that is the arrangement of the coils for the
desired effect and the design of coils which can be helical, squared
off, etc.
Thanks.
Buck
Buck:
Yeah, all that alright.
However, he also claims the "arrangement" he has increases the impedance
of the 1/4 wave shortened antenna to 72-100 ohms. This is interesting
in and of itself, shortened antennas tend to have impedances in the
single digits and are difficult to match efficiently ...
I am just beginning to toy with this version, maybe can get serious this
weekend ...
Regards,
JS
John, I know nothing about vertical whips and I haven't been following
the whole thread
but it does come to mind that the aperture, which is related to gain,
appears to be
determined by the smallest diameter drawn that can include the antenna
physical configuration.
Ofcourse to do this is to have the largest capacity hat as possible
with the minimum
wire resistance wire that obtains the highest resistance(coil
windings) meaning that even if
the actual resistance is high so is the radiation resistance. All
these factors
are varying in curve form ( See Terman for typical curves of all
variables)
so you may get some insight on what is really happening by reviewing
the
cross over points of some of these curves relative to the diameter of
the capacity hat.
Take all of this with a pinch of salt but the answer may well be there
some where
when looking for the size of the aperture.
Regards
Art