Which parameter determines the vertical spread of the beam (15-30 degrees)?

• A. Horizontal Beam Width
• B. Vertical Beam Width
• C. Pulse Repetition Frequency
• D. Antenna height

Answer: (B)

The parameter that sets how wide the beam is in the vertical direction is the vertical beam width. This defines the elevation span of the main radiation lobe, so a 15–30 degree spread is determined by the vertical beam width. Horizontal beam width would control side-to-side spread, not up-and-down. Pulse repetition frequency affects how often pulses are emitted and influences range and Doppler processing, not the beam’s angular spread. Antenna height changes where the beam footprint lands but not the inherent vertical spread of the beam.