The active elements in a convex array are much _________ than those found in a phased array.

The active elements in a convex array are much _________ than those found in a phased array.

• A. Larger
• B. Smaller
• C. More numerous
• D. Equal

Answer: (A)

Active elements are the individual transducer crystals that are energized to emit sound. A convex array uses a curved, arc-shaped aperture, so to cover that wide curved surface effectively and maintain sensitivity along the arc, the elements are made relatively large. In a phased array, many small elements are packed into a flat or lightly curved panel to enable fine electronic steering and focusing, which means each individual element is smaller. Because of this geometrical and beamforming difference, the active elements in a convex array are much larger than those in a phased array.

Active elements are the individual transducer crystals that are energized to emit sound. A convex array uses a curved, arc-shaped aperture, so to cover that wide curved surface effectively and maintain sensitivity along the arc, the elements are made relatively large. In a phased array, many small elements are packed into a flat or lightly curved panel to enable fine electronic steering and focusing, which means each individual element is smaller. Because of this geometrical and beamforming difference, the active elements in a convex array are much larger than those in a phased array.