It is argues that the far-field lobes of the edge elements of a uniformly excited linear array are nearly equal to the sidelobes of the array itself, and hence the edge elements are ideal for cancellation of specific sidelobes of the pattern. This supports the concept of partial adaptivity using only the edge elements. This technique is suitable for real-time implementation because only the edge elements require direct control; the inner elements are controlled by programmable read-only memories. Other advantages reported are: the nulls produced specifically by control of the edge elements are deep and wide, and the main-beam gain is not much affected by the sidelobe cancellation.
展开▼
