Buried Radials - a new look!
 

NOW AVAILABLE ** New Program "RADIALS2.exe"

This program takes a fresh, revolutionary look at the design and performance
of a set of shallow-buried ground radials. Gone at last are the days when
118.5 was a sacred number.

A radial wire is considered as a lossy transmission line, there being no
point in having it any longer than that at which its input impedance Zin has
converged on its characteristic impedance Zo. The current flowing in the
line at that distance from the input end is clearly small enough not to
warrant extending the radial any further. With a crude knowledge of the
resistivity and permittivity of the soil the greatest practical length of
radial wires can be calculated. The number of radials can then be estimated
on the logical grounds of economics versus antenna + transmitter radiating
efficiency.

Download program RADIALS2, 53 kilobytes, in a few seconds from website below
and run immediately.
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.................................................. ..........
Regards from Reg, G4FGQ
For Free Radio Design Software go to
http://www.btinternet.com/~g4fgq.regp
.................................................. ..........

"Reg Edwards" wrote in message ...
NOW AVAILABLE ** New Program "RADIALS2.exe"
...
Download program RADIALS2, 53 kilobytes, in a few seconds from website below
and run immediately.
----
.................................................. .........
Regards from Reg, G4FGQ
For Free Radio Design Software go to
http://www.btinternet.com/~g4fgq.regp
.................................................. .........

Hi Reg,
TNX for more new programs. I find your ham software very useful.
WARNING: The code on your page has probably been tampered with. When I
left-click directly on the RADIALS2 link, I am redirected to a strange
server. When I right-click, the "Properties" seem to be OK, but an
attempt to "Save Target" fails. I had to hand-type the proper path to
RADIALS2.EXE into the MSIE address line, then I got the software.

BR from Ivan

"K9SQG" wrote
From my research I've found indications that radial length beyond a
quarter
wavelength is indeed significant out to about two wavelengths.

===============================

Only indications?

At what frequency?

At a distance of two wavelengths you are in the far field. Any improvement
in distant signal strength has little to do with antenna/transmitter
radiating efficiency which depends only on what takes place in the near
field. More to do with less-lossy ground reflections part way along the
propagation path.

Very long radials behave similarly to large ground mats laid half way along
a two-hop path.
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Reg, G4FGQ