This letter proposes an improved scheme for low-sidelobe beam broadening of spaceborne large-scale phased arrays, addressing the efficiency and performance limitations of typical algorithms in synergistically achieving controllable beamwidth, low sidelobe suppression and high solution robustness. By integrating a dynamic subarray partitioning mechanism into crossover and mutation operations and optimizing the fitness function with a robustness constraint term, the scheme enhances optimization capability. Comparative experiments under varied beam pointing directions confirm the scheme’s effectiveness: the SA-JADE algorithm stably meets beam broadening targets with excellent sidelobe suppression and solution robustness, offering reliable technical support for spaceborne phased array applications.
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