This paper presents an efficient method to improve the far-field radiation pattern of concentric circular antenna array (CCAA) design using two stochastic optimization algorithms known as social spider algorithm (SSA) and modified social spider algorithm (MSSA). Low side lobe level (SLL) plays a crucial role in reducing the interference with the other frequency components along the entire side lobes of the far-field radiation pattern. SSA and MSAA are the state-of-the-art evolutionary optimization techniques which are applied here to determine the optimal current amplitude and the inter-element distance between two consecutive antennae of the 3-ring CCAA. In this paper, the optimal results achieved by using SSA, MSSA for (4, 6, 8) elements and (8, 10, 12) elements 3-ring CCAAs, with and without centre elements are reported. The results achieved by employing SSA and MSSA show a considerable improvement in SLL reduction as compared to the uniform and the other array patterns reported in the state-of-the-art literature.

本文提出了一种改进同心圆天线阵列 (CCAA) 设计的远场辐射方向图的有效方法，该方法使用两种随机优化算法，即社会蜘蛛算法 (SSA) 和改进的社会蜘蛛算法 (MSSA)。低旁瓣电平 (SLL) 在减少沿远场辐射方向图的整个旁瓣的其他频率分量的干扰方面起着至关重要的作用。SSA 和 MSAA 是最先进的进化优化技术，在这里应用它们来确定最佳电流幅度和 3 环 CCAA 的两个连续天线之间的元件间距离。在本文中，报告了使用 SSA、MSSA 对 (4, 6, 8) 元素和 (8, 10, 12) 元素 3 环 CCAAs（有和没有中心元素）取得的最佳结果。