Figure 79.
A λ/2 dipole in free space.
Figure 80. Effect of ground doublet radiation pattern
(height 20 - 40 feet above ground).
b. Sag.
Antennas erected for low frequencies tend to be very
long, over two hundred feet long.
Antennas that long tend to sag
unless supported in the middle.
Significant signal loss can result
if the antenna is not supported. See figure 81. To
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