Statistical Density and Amplitude Tapered Array
Abstract
Statistical density and amplitude tapering are combined to improve the radiation characteristics of thinned, density tapered arrays by allowing changes in both element density and amplitude weight to better approximate the model amplitude distribution. Statistical density tapering (which uses only uniformly weighted elements) is extended so that each element is allocated one of several possible values of amplitude weight according to predefined selection probabilities. Increasing the number of possible values, or levels for amplitude weight can reduce the sidelobe levels of an array. Several choices of levels and their probabilities can reduce sidelobes and satisfy the extension criteria. One of the lowest sidelobe levels is produced if: (a) the amplitude levels are equi- spaced in the allowable range between zero and unity, and (b) their selection probabilities are terms from the binomial distribution of the appropriate order. The properties of arrays designed using equi-spaced amplitude levels with binomially distributed selection probabilities are calculated and described as a function of the number of levels and aperture size. Great Britain.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1988
- Accession Number
- ADA203483
Entities
People
- G. J. Ball
Organizations
- Royal Signals and Radar Establishment