A straight spike line in a linear phased array results in a beam that is not focused, i.e., it is:

A straight spike line in a linear phased array results in a beam that is not focused, i.e., it is:

• A. Highly Focused
• B. Unfocused
• C. Narrow
• D. Divergent

Answer: (B)

In a linear phased array, focusing comes from applying a deliberate pattern of delays across the elements to bend the wavefront so that energy concentrates at a specific point. A straight spike line across the aperture means the delays don’t create that curved, converging wavefront; the elements are driven in a way that produces a planar (or non-converging) wavefront. Without a focal point, energy isn’t concentrated at a spot, so the beam isn’t focused. It doesn’t have the tight, pointed focus of a highly focused beam, nor is it described by very narrow directivity or deliberate divergence; the defining trait here is that it remains unfocused.

In a linear phased array, focusing comes from applying a deliberate pattern of delays across the elements to bend the wavefront so that energy concentrates at a specific point. A straight spike line across the aperture means the delays don’t create that curved, converging wavefront; the elements are driven in a way that produces a planar (or non-converging) wavefront. Without a focal point, energy isn’t concentrated at a spot, so the beam isn’t focused. It doesn’t have the tight, pointed focus of a highly focused beam, nor is it described by very narrow directivity or deliberate divergence; the defining trait here is that it remains unfocused.