19.
The antenna system show in Figure 167 uses a modified parabolic
reflector to concentrate the RF energy into the desired beam pattern.
The antenna's feed system can be classified as a
a.
rear feed system using a horn.
b.
front feed system using a horn.
c.
rear feed system using a dipole.
d.
front feed system using a dipole.
20.
A radar antenna that uses a front feed system is represented in Figure
a.
139 C.
b.
143.
c.
149.
d.
150.
227
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