[Lowfer] Radials under dipole ends - Any Benefit ?
KD7JYK DM09
kd7jyk at earthlink.net
Sun Oct 16 01:03:16 EDT 2016
: Would this provide any benefit, or be a waste of time, and wire ??
If your dipole is low, and your intent is to use it for NVIS (Near Vertical
Incidence Skywave), then it will help immensely as it would stabilize the
ground reference for such radiation. For the average dipole, which has a
certain predictable pattern based on free-space calculations, the radiation
pattern (lobes) which can be found online, it would just add more random
relative uncertainty to a real life installation. You may find that by
altering the lobes with such an addition that it actually benefits you in
some way, the same way that changing angle, height, relative location to a
metal building, et cetera may, but to know if it will be a benefit or have a
negative impact before you do it isn't easy. In short, not likely at all to
do anything beneficial for you.
Now, if you were to change your dipole to a V (not inverted V), use six or
eight radials with the radials under that separated by a space, you'd have a
large broadband upside down discone antenna! That would require a lot of
supporting structure, though...
Kurt
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