What is the passive aperture or elevation of an ultrasonic phased array?

The passive aperture or elevation of an ultrasonic phased array refers to the physical dimension of a single array element. In this context, it is critical to understand that the overall operation of a phased array relies on the individual characteristics of each element, including their length, which impacts how effectively they can transmit and receive ultrasonic waves.

The length of an individual array element is fundamental to its performance. It determines the frequency response, beamforming capabilities, and overall resolution of the ultrasonic inspection. When operating in phased array technology, the elevation aperture significantly affects the ability to gather data from specific angles, impacting the analysis of the received signals and the quality of the imaging or the defect detection.

Understanding this concept is essential, as it directly influences how the array elements are configured and how they interact in creating the desired sound field through electronic steering of the beam.