Figure 136.
Simple Dipole With a Director.
b. Notice that the radiation pattern of a dipole with a director is
similar to a dipole with reflector. Now, what will the radiation pattern be
if you add both a reflector and a director to the simple dipole?
10. Dipole with director and reflector.
a. Adding both a director and a reflector to a dipole makes the antenna
more directional.
In fact, the more parasitic elements you add, the more
directional the antenna gets. An antenna with several parasitic elements is
shown in Figure 137; it's called a YAGI antenna. Notice that the radiation
pattern is more directional because of the additional directors.
Figure 137.
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