November 14th 04, 09:27 PM
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"Frank" wrote in message news:...
Funny, posted this earlier, but did not seem to take.
"Frank" wrote in message news:...
"Richard Clark" wrote in message
...
On Fri, 12 Nov 2004 19:07:34 +0000 (UTC),
(curiousjohn4) wrote:
In fact, there was significant induced voltage from a very long wire.
Hi OM,
You are treading water here. There is more than radiation at work
very close to an antenna. Consider your own language above: Induction
(or even capacitive coupling).
73's
Richard Clark, KB7QHC
I think Richard has hit the nail on the head. I wish calculation of
electromagnetic fields could be reduced to a simple equation. Any
undergraduate text on electromagnetics barely scratches the surface. I
suggest you check the site at www.nec2.org and download the .pdf version
of the "NEC Program Description -- Theory". Gives an overview of "Method
of Moments". As a foundation Kraus' Electromagnetics may help, and is
available used (and cheap) at www.bn.com. Also at the same site a
reprint of "Field Computation by Moment Methods" by Roger F. Harrington
can be obtained for $33.50. Then there is the "Finite Element" method as
used by "Ansoft's" HFSS".
Regards,
Frank
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