Signal/noise performance of super-directive arrays
A super-directive array is defined as one whose effective aperture exceeds its physical aperture, and it is shown that while such an array has a Directivity Index somewhat better than that of an ordinary array, nevertheless its Noise Factor is much worse. Consequently, in many receiving
systems, the use of super-directivity is not be recommended. The conception of super-directivity is extended to bearing-determining arrays which give a null response on the axis, and it is shown that the same disadvantage of a bad Noise Factor applies to them also.
Document Type: Research Article
Publication date: 01 January 1958
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