Damage to one element of a phased array transducer results in beam steering that is

• A. Inconsistent
• B. Consistent
• C. Predictable
• D. Steady

Answer: (A)

In a phased array, beam steering comes from precise timing and amplitude of signals across all elements so their waves interfere constructively in the desired direction. If one element is damaged and not contributing properly, that disruption changes the overall aperture and the interference pattern. As you steer, the missing element causes the main beam direction to wander unpredictably, and the beam shape and sidelobe levels become irregular. So the steering becomes unreliable and inconsistent across angles, rather than staying steady, predictable, or uniformly consistent. The idea is that the damaged element breaks the uniform, controlled interference necessary for stable steering, leading to inconsistent results.