This work is concerned with the methodology for improvement of the radiation pattern performance and eliminating the effect of unwanted interference of symmetric time modulated linear antenna array (STMLAA) in the predefined direction. This is achieved using evolutionary technique called Novel Particle Swarm Optimization with Wavelet Mutation (NPSOWM) for various application specific optimization like SLL only reduction, dual broad null and multiple broad null optimization. The optimized results obtained by using NPSOWM are validated by CST-MWS by captivating practical elements of dipole antenna and its array configuration. The numerical results show the effect of the particular (practical) antenna on the array. Various examples have taken for this purpose. A set of 16-element antenna array have designed for SLL only reduction. 16-, 32-, and 64-element STMLAA for incorporating the dual broad nulls in the angular range from 400 to 700 over the elevation plane. A set of 24-, 30-, and 32-element antenna array have occupied for multiple broad nulls. The strength of the adopted algorithm is tested for different number of array antenna configuration, which establish the efficacy of the optimization technique NPSOWM adopted for achieving the interference cancellation in the predefined direction and performance improvement of the antenna array such as simultaneous improvements of broad nulls (BNs), sidelobe level (SLL), sideband level (SBL), and the directivity. From the simulated results it is clear that NPSOWM can perform better than that of un-optimized linear antenna array with respect to BNs, SLL, and SBLs and Directivity.

中文翻译：

---

用于辐射方向图中减少 SLL、双重和多重宽零的定时天线阵列的优化设计

这项工作涉及改进辐射方向图性能和消除对称时间调制线性天线阵列 (STMLAA) 在预定义方向上的有害干扰影响的方法。这是使用称为具有小波变异的新型粒子群优化 (NPSOWM) 的进化技术实现的，用于各种特定于应用程序的优化，如仅 SLL 减少、双宽空和多宽空优化。使用 NPSOWM 获得的优化结果通过 CST-MWS 通过吸引偶极天线及其阵列配置的实际元件进行验证。数值结果显示了特定（实用）天线对阵列的影响。为此目的采取了各种例子。一组 16 单元天线阵列专为仅减少 SLL 而设计。16-, 32-, 和 64 个元素的 STMLAA，用于在仰角平面上从 400 到 700 的角度范围内合并双宽零点。一组 24 单元、30 单元和 32 单元的天线阵列已经占据了多个广泛的零点。所采用算法的强度针对不同数量的阵列天线配置进行了测试，这确立了优化技术 NPSOWM 在实现预定义方向上的干扰消除和天线阵列的性能改进（例如宽零点的同时改进）方面的功效（ BN)、旁瓣电平 (SLL)、边带电平 (SBL) 和方向性。从模拟结果可以明显看出，在 BN、SLL 和 SBL 以及方向性方面，NPSOM 的性能优于未优化的线性天线阵列。