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基于混沌交换非线性蒲公英优化算法的时间调制阵列天线旁瓣和边带最小化

Sidelobes and sideband minimization in time-modulated array antenna based on chaotic exchange nonlinear dandelion optimization algorithm.

作者信息

Li JianHui, Liu Yan, Zhao WanRu, Zhu TianNing, Wang YiBo, Hu Kui

机构信息

School of Physics and Electronic Information, Yunnan Normal University, Kunming, Yunnan Province, China.

出版信息

Sci Rep. 2024 Aug 19;14(1):19150. doi: 10.1038/s41598-024-70222-y.

DOI:10.1038/s41598-024-70222-y
PMID:39160212
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11333606/
Abstract

Time-modulated array antenna (TMAA) is a new type of array antenna based on time modulation technology. By introducing "time" as the fourth dimensional design freedom into the design of conventional array antennas in three-dimensional space, the array antenna has time modulation characteristics, which better controls the radiation characteristics of the array antenna and achieves the best far-field radiation pattern synthesis. This paper designs a Time-modulated linear array (TMLA) with low sidelobe level (SLL) and low sideband level (SBL) based on the chaotic exchange nonlinear dandelion optimization (CENDO) algorithm. Three optimization methods are studied: firstly, determining the optimal on-time (τ) for each array element; The second is to determine the optimal on-time (τ) and optimal uniform array element spacing (d) for each array element; The third is to determine the optimal opening time (t), closing time (t), and optimal uniform array element spacing (d) for each array element. To achieve simultaneous reduction of sidelobe level and suppression of harmonic interference. The same array model contains different harmonic frequency radiation. In this article, we only considered two harmonic frequencies, namely the first sideband frequency and the second sideband frequency. Because the harmonic of other sideband frequencies has a very small impact on the radiation of the fundamental wave, it can be ignored. To demonstrate the stronger ability of the CENDO algorithm in optimizing Time-modulated array antennas, and in line with the principle of fairness and impartiality, this paper also simulates different Time-modulated array models and compares the results of the CENDO algorithm with other published literature. It is concluded that this study shows lower SLL and lower SBL in different models. This provides a more scientific and accurate explanation of the superiority of the CENDO algorithm compared to other algorithms in the field of antenna optimization in electromagnetics. At the same time, this also provides great research value and fundamental support for designing high-performance Time-modulated array antennas in subsequent engineering applications.

摘要

时间调制阵列天线（TMAA）是一种基于时间调制技术的新型阵列天线。通过将“时间”作为第四维设计自由度引入三维空间中传统阵列天线的设计，该阵列天线具有时间调制特性，能更好地控制阵列天线的辐射特性，实现最佳的远场辐射方向图合成。本文基于混沌交换非线性蒲公英优化（CENDO）算法设计了一种具有低旁瓣电平（SLL）和低边带电平（SBL）的时间调制线性阵列（TMLA）。研究了三种优化方法：首先，确定每个阵列单元的最佳导通时间（τ）；其次，确定每个阵列单元的最佳导通时间（τ）和最佳均匀阵列单元间距（d）；第三，确定每个阵列单元的最佳开启时间（t）、关闭时间（t）和最佳均匀阵列单元间距（d）。以实现旁瓣电平的同时降低和谐波干扰的抑制。同一阵列模型包含不同的谐波频率辐射。在本文中，我们仅考虑了两个谐波频率，即第一边带频率和第二边带频率。因为其他边带频率的谐波对基波辐射的影响非常小，可以忽略不计。为了证明CENDO算法在优化时间调制阵列天线方面具有更强的能力，并且符合公平公正的原则，本文还对不同的时间调制阵列模型进行了仿真，并将CENDO算法的结果与其他已发表文献进行了比较。得出的结论是，本研究在不同模型中显示出较低的SLL和较低的SBL。这为CENDO算法在电磁学天线优化领域相对于其他算法的优越性提供了更科学准确的解释。同时，这也为后续工程应用中设计高性能时间调制阵列天线提供了巨大的研究价值和基础支持。

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