MinimiLation of the maximum sidelobe level for a given arraj geometrj bj phase-onl) adjustment of the element excitations is considered. Optimum phases are obtained by using a numerical search procedure to minimize the expression for the pattern sidelobe level with respect to the element phases, and results for both linear and planar arrays of equispaced elements are presented. Data suggest that optimum sidelobe level is a logarithmic function of array size, and optimum patterns have relathe efficiencies that are typicall) somewhat greater than for comparable amplitude tapered arrays. An analytic synthesis algorithm is presented for use on very large arrays for which the numerical search technique for the minimization of the sidelobe level is computationally impractical. This method produces patterns with characteristics similar to arrays synthesized using the numerical search method, i.e., relatively uniform angular distribution of energj in the sidelobe region, and generally decreasing maximum sidelobe level as the array size is increased.
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