N9DX Wrote:
> For some time, I've been trying to create some mental image with which to
> visualize the induction into ground which takes place within the
induction
> field around an elevated radial. I've also been trying to form a mental
> image of the current which results. I doubt that the present
visualization
> is very accurate. If anyone has facts or even educated guesses, I'd be
> very interested in hearing about them and suspect others would too.
An excellent treatment of the currents and losses involved with short
vertical antennas is contained in Earling D. Sunde's (Bell Telephone Labs)
book EARTH CONDUCTION EFFECTS IN TRANSMISSION SYSTEMS, Dover Publications
Inc., NY (now out of print, but your local university or industry research
library can obtain a copy for you for a short time throught the
inter-library loan program.
There are actually three currents involved; displacement currents,
conduction currents, and earth induced currents, all which interact in a
very complex manner and Sunde provides an excellent explanation and
mathamatical treatment (brush up on your calculus!).
Dave, K1FK
Fort Kent, ME
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