Center-Dense Antenna Array Layout for Grating Lobe Cancellation

The patent applies local quality by creating non-uniform antenna element distribution where the density of elements varies across different regions of the array. Specifically, elements are arranged with higher density in certain areas and lower density in others, which suppresses grating lobes and side lobes while maintaining manufacturing feasibility. This local variation in element density directly addresses the harmful radiation patterns without requiring complete structural redesign.

The patent employs asymmetry by deliberately arranging antenna elements in a non-symmetric, non-uniform pattern across the two-dimensional array. This asymmetric distribution breaks the periodicity that causes grating lobes, while the overall array geometry remains regular and manufacturable. The asymmetric element placement within the uniform grid framework resolves the contradiction between structural simplicity and performance optimization.

The patent applies segmentation by dividing the antenna array into multiple sub-arrays, each with its own phase shifter. This segmentation allows for reduced overall complexity while maintaining control precision through localized phase management. The non-uniform element distribution within each sub-array further simplifies phase center calculations by creating predictable radiation patterns that require less complex compensation algorithms.

The patent utilizes parameter changes by modifying the spatial distribution parameters of antenna elements (density, positioning) to directly influence phase center characteristics. This parameter optimization allows for simplified phase center calculations while maintaining beam control precision, as the non-uniform distribution creates more predictable and manageable phase relationships across the array.

The patent applies local quality by implementing variable element density across different regions of the array coverage area. Instead of uniform dense distribution, elements are strategically placed with varying density - higher in regions that contribute to main beam formation and lower in regions that would generate grating lobes. This local optimization maintains effective coverage area while suppressing harmful radiation patterns.

The patent addresses the area-grating lobe contradiction by introducing density variation as an additional dimension of control within the two-dimensional array plane. This creates a three-dimensional optimization space (x-position, y-position, density) that allows maximization of effective coverage area while minimizing grating lobe generation through strategic element placement density modulation.