DFT processing of phased arrays operating in sequential mode with prime element spacing

Abstract

The authors extend DFT (discrete Fourier transform) processing of phased arrays operating in sequential mode to primely spaced arrays. Advantages include: one can use elements of different sizes to improve the gain; the information sequence is smaller and needs less memory storage; lower sidelobe levels are achieved without the need of tapering hardware; and fewer elements can be used without degrading the array pattern. Examples validate and demonstrate the technique. The approach is demonstrated for both linear and rectangular arrays.<>