Which statement best describes the radiation pattern of reflector antennas?

Which statement best describes the radiation pattern of reflector antennas?

• A. Radiates energy uniformly in all directions.
• B. Only radiates in vertical plane.
• C. No fixed pattern.
• D. Provides a 360° horizontal radiation pattern with strong energy in two dimensions.

Answer: (D)

Reflector antennas use a parabolic dish to turn the energy from the feed into a focused, directional beam. The circular aperture of the dish makes the pattern symmetric around the axis, so as the antenna can be rotated, it delivers energy around 360 degrees in the horizontal plane while still concentrating most of the power into a narrow main beam. That means there’s strong energy in the beam across two dimensions—horizontal and vertical near the beam direction—rather than a uniform spread. The pattern is defined by the dish geometry and feed, so it isn’t isotropic or unfixed. Therefore, the description that best fits is a 360° horizontal pattern with a strong, two‑dimensional beam.

Reflector antennas use a parabolic dish to turn the energy from the feed into a focused, directional beam. The circular aperture of the dish makes the pattern symmetric around the axis, so as the antenna can be rotated, it delivers energy around 360 degrees in the horizontal plane while still concentrating most of the power into a narrow main beam. That means there’s strong energy in the beam across two dimensions—horizontal and vertical near the beam direction—rather than a uniform spread. The pattern is defined by the dish geometry and feed, so it isn’t isotropic or unfixed. Therefore, the description that best fits is a 360° horizontal pattern with a strong, two‑dimensional beam.