Designing Large-Element-Spacing Arrays for Diverse Modular Subarrays Through Iterative Convex Relaxation Optimization

This paper introduces a novel modular subarray design method that employs large-element-spacing modular subarrays. By strategically designing the structure and placement of the basic modular units, the method effectively suppresses grating lobes caused by large inter-element spacings (exceeding half a wavelength). Traditional large-element-spacing array designs are always non-modular, leading to inconvenience in design, manufacturing, assembly, and maintenance. The proposed modular design simplifies production and assembly while maintaining excellent pattern performance. The design outcomes are obtained through Iterative Convex Relaxation Optimization. Numerical simulations and analyses confirm the efficacy of the proposed design.