Which statement describes the arrangement of the linear sequential array's active elements?

• A. Side by side in a line
• B. In a circular ring
• C. In a straight line of rectangular strips
• D. In a grid

Answer: (A)

The key idea is that a linear sequential array uses active elements arranged side by side along a single straight line to form a slender, one-dimensional aperture. This straight-line arrangement lets engineers steer and focus the beam by applying appropriate phase delays across the elements in that line, producing scanning across one plane. A circular ring would create a ring-shaped aperture, not a line; a grid would be a two-dimensional array with rows and columns; describing the elements as a straight line of rectangular strips emphasizes the one-dimensional, linear arrangement that defines this type of array.