Figure 142.
Broad and Narrow Vertical Beams.
b. By using a narrow vertical bean as in Part B of Figure 142, we get
accurate information on target elevation. Now, as soon as the set picks up
a target, the antenna aims directly at the target.
c. Some radar sets need a beam that is narrow both vertically and
horizontally. For example, a tracking radar like radar set M-33 must give
accurate information on both azimuth and elevation.
Therefore, the beam
sent out by the M-33 antenna must be narrow both vertically and
horizontally.
19. The main points to remember about radar beams.
a. Radar beamwidth is measured in degrees, horizontally and vertically.
b. A narrow horizontal beam gives accurate azimuth information.
c. A narrow vertical beam gives accurate elevation information.
d. A beam that is narrow both vertically and
horizontally
gives
accurate information on both azimuth and elevation.
e. Search radar sets have a narrow horizontal beamwidth.
f. Height-finding radar sets have a narrow vertical beamwidth.
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