The Gain of Steered Sonar Arrays,
Abstract
Two methods of calculating the gain of an array in simple and complex noise fields are presented. One method approaches the solutions from a knowledge of the spatial correlation of the noise, the other from a knowledge of the directivity pattern of the array. It is shown that the gain of an array varies as the response is steered unless the noise is omnidirectional and all interelement distances are exact integer multiples of half-a-wavelength, when the gain is constant at a value of (10)(log base 10)(N). However these gain variations reduce as the number of elements is increased until with fifty elements the gain is effectively constant over a 60 degree sector either side of the broadside position. Examples are given of linear and planar arrays in both types of noise field. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1973
- Accession Number
- AD0771954
Entities
People
- P. J. Enoch
Organizations
- Admiralty Research Laboratory