Discussion
How is scan blindness usually avoided in a practical array?
Answer: A
Since the effect comes from a surface wave the structure supports, the cure is to design the element, ground plane and radome so that no such wave is trapped in the scan range. Baffles between elements are sometimes used. Reducing element count shrinks the aperture without curing anything, wider spacing brings grating lobes, and amplitude distribution has no bearing on the phenomenon. It is one of the effects that only a full wave simulation or a measurement will reveal.
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