To: <towertalk@contesting.com>
> Date: Tue, 05 May 1998 13:04:05 -0400
> From: Pete Smith <n4zr@contesting.com>
> Isn't it "the square of the distance"?
This is getting off the subject of antennas, sorta.
The force reduction is by square of the distance for a charge
distant enough to look like every thing comes from a *single point*
in space. Then Coulomb's 1/R^2 law applies.
But if the source of the field is close enough that the charge
doesn't appear to come from a single point in space, the effect
changes.
In the case where the charge appears to come from a very large
area, force falls off at the rate of 1 / distance. Inverse to the
distance. There is a gradual change to the 1/R^2 law as the point
under consideration moves out.
I'm assuming we have a mast on top of a tall tower, and the antenna
is close enough to the tower and mast the tower and mast don't look
like a single point.
73, Tom W8JI
w8ji.tom@MCIONE.com
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