Which type of array is formed by multiple discrete elements arranged in a straight line, created from a single PZT slab?

Which type of array is formed by multiple discrete elements arranged in a straight line, created from a single PZT slab?

• A. Linear phased array
• B. Linear array
• C. Annular array
• D. Convex array

Answer: (A)

Think about how ultrasound transducers form beams. When you have several small elements lined up in a straight row and they’re cut from one piece of piezoelectric material, that’s a linear array. If those elements are driven with precise time delays so the waves add up constructively and you can steer or focus the beam electronically, that arrangement is a linear phased array. The straight-line geometry and single-PZT-slab origin fit this description, and the “phased” part highlights the electronic steering capability that often accompanies this type. The other shapes—annular (concentric rings) and convex (a curved line)—do not match the straight-line, single-slab setup described here.

Think about how ultrasound transducers form beams. When you have several small elements lined up in a straight row and they’re cut from one piece of piezoelectric material, that’s a linear array. If those elements are driven with precise time delays so the waves add up constructively and you can steer or focus the beam electronically, that arrangement is a linear phased array. The straight-line geometry and single-PZT-slab origin fit this description, and the “phased” part highlights the electronic steering capability that often accompanies this type. The other shapes—annular (concentric rings) and convex (a curved line)—do not match the straight-line, single-slab setup described here.