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Improved Salp swarm optimization based circular arrays in presence of mutual coupling
International Journal of RF and Microwave Computer-Aided Engineering ( IF 1.7 ) Pub Date : 2021-04-27 , DOI: 10.1002/mmce.22719
Hrudananda Pradhan 1 , Biswa Binayak Mangaraj 1 , Santanu Kumar Behera 2
Affiliation  

This article presents optimization of circular arrays with mutual coupling effect (MCE) using newly developed algorithm, Improved Salp swarm optimization (ISSO). ISSO is employed to achieve optimum radiation patterns of circular array (CA), and concentric circular array (CCA). The radiation patterns illustrate directive main beams with various outcomes, such as suppressed maximum side lobe level, deep nulls placed in specific directions, and maximum possible directivity. The main beams of the patterns are made narrow and directive by maintaining the first null beam widths equal or less than that of uniform CA and CCA throughout the optimization process. The above performance parameters are obtained by optimizing the parameters like excitation currents, positions, and phases of the array elements, and number of array elements using a multi-objective optimization function (OF). The OF is formulated by considering the performance parameters and MCE. The outcomes are analyzed for eight different optimization case studies of CA and CCA. The results of the CA and CAA using ISSO are compared with that of other optimization methods found in the literature. The performance parameters of the case studies considered indicate that CA configurations using ISSO offer improved performance relative to uniform arrays and the configurations achieved using other methods of optimization.

中文翻译:

存在互耦时改进的基于 Salp 群优化的圆形阵列

本文介绍了使用新开发的算法改进 Salp 群优化 (ISSO) 对具有互耦合效应 (MCE) 的圆形阵列进行优化。ISSO 用于实现圆形阵列 (CA) 和同心圆形阵列 (CCA) 的最佳辐射方向图。辐射图说明了具有各种结果的定向主波束,例如抑制的最大旁瓣电平、位于特定方向的深度零点以及最大可能的方向性。通过在整个优化过程中保持第一零光束宽度等于或小于均匀 CA 和 CCA 的宽度,使图案的主光束变窄和定向。上述性能参数是对阵元的励磁电流、位置、相位等参数进行优化得到的,和使用多目标优化函数 (OF) 的数组元素数量。OF 是通过考虑性能参数和 MCE 来制定的。对 CA 和 CCA 的八个不同优化案例研究的结果进行了分析。将使用 ISSO 的 CA 和 CAA 的结果与文献中发现的其他优化方法的结果进行比较。所考虑的案例研究的性能参数表明,相对于均匀阵列和使用其他优化方法实现的配置,使用 ISSO 的 CA 配置提供了更高的性能。将使用 ISSO 的 CA 和 CAA 的结果与文献中发现的其他优化方法的结果进行比较。所考虑的案例研究的性能参数表明,相对于均匀阵列和使用其他优化方法实现的配置,使用 ISSO 的 CA 配置提供了更高的性能。将使用 ISSO 的 CA 和 CAA 的结果与文献中发现的其他优化方法的结果进行比较。所考虑的案例研究的性能参数表明,相对于均匀阵列和使用其他优化方法实现的配置,使用 ISSO 的 CA 配置提供了更高的性能。
更新日期:2021-07-02
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