Pattern reconfigurable antenna with specified main lobe deflection and stable bandwidth by using bistable composite laminates

IF 3.7 3区材料科学 Q1 INSTRUMENTS & INSTRUMENTATION

Smart Materials and Structures Pub Date : 2024-06-26 DOI:10.1088/1361-665x/ad5943

Mingyue Zhang, Wei Tong, Guangyu Xu, Qi Wang and Renjing Gao

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引用次数: 0

Abstract

Pattern reconfiguration of antennas has become a very important measure to improve the signal gain and working bandwidth by manipulating beam direction. Developing rational methods to find the reconfigurable structure is a key problem. In this paper, a collaborative optimization method is proposed to comprehensively consider both the geometric parameters of the bistable substrate and the size of the radiation patch. This method enables the design of a pattern reconfigurable antenna with specified main lobe deflection and stable bandwidth. Specifically, by using a two-step process, the log-periodic dipole antenna (LPDA) is conformally mapped from the planar substrate to the bistable substrate. Further investigation reveals that the main lobe deflection angle and bandwidth stability are influenced by the geometric parameters of the bistable substrate and the size of radiation dipoles, respectively. Thus, these parameters are selected as design variables for solving the proposed collaborative optimization model. The transformation between two stable configurations enables the proposed LPDA to deflect the main lobe of the H-plane pattern by 30° while maintaining consistency in the E-plane patterns. Importantly, the resonant frequencies remain unaffected and the bandwidth does not decrease during the pattern reconfiguration. Notably, the pattern reconfigurable mechanism is rooted in that the transformation between the two stable configurations alters the number and position of the dipoles in the radiation region and their current path, thereby changing the radiation direction of electromagnetic waves. The proposed collaborative optimization method has a potential application for other types of antennas and offers opportunities for various applications in the field of wireless communication.

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利用双稳态复合层压板实现具有指定主叶偏转和稳定带宽的图案可重构天线

通过操纵波束方向来提高信号增益和工作带宽，天线的模式重构已成为一项非常重要的措施。开发合理的方法来寻找可重构的结构是一个关键问题。本文提出了一种协同优化方法，综合考虑双稳态基板的几何参数和辐射贴片的尺寸。这种方法可以设计出具有指定主叶偏转和稳定带宽的模式可重构天线。具体来说，通过两步流程，对数周期偶极子天线（LPDA）从平面基板保形映射到双稳态基板。进一步研究发现，主叶偏转角和带宽稳定性分别受双稳态基板几何参数和辐射偶极子尺寸的影响。因此，这些参数被选为设计变量，用于求解所提出的协同优化模型。两种稳定配置之间的转换使拟议的 LPDA 能够将 H 平面图案的主叶偏转 30°，同时保持 E 平面图案的一致性。重要的是，在图案重新配置过程中，谐振频率不受影响，带宽也不会降低。值得注意的是，图案可重构机制的根源在于两种稳定配置之间的转换改变了辐射区域偶极子的数量和位置及其当前路径，从而改变了电磁波的辐射方向。所提出的协作优化方法有可能应用于其他类型的天线，并为无线通信领域的各种应用提供了机会。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Smart Materials and Structures 工程技术-材料科学：综合

CiteScore

7.50

自引率

12.20%

发文量

317

审稿时长

3 months

期刊介绍： Smart Materials and Structures (SMS) is a multi-disciplinary engineering journal that explores the creation and utilization of novel forms of transduction. It is a leading journal in the area of smart materials and structures, publishing the most important results from different regions of the world, largely from Asia, Europe and North America. The results may be as disparate as the development of new materials and active composite systems, derived using theoretical predictions to complex structural systems, which generate new capabilities by incorporating enabling new smart material transducers. The theoretical predictions are usually accompanied with experimental verification, characterizing the performance of new structures and devices. These systems are examined from the nanoscale to the macroscopic. SMS has a Board of Associate Editors who are specialists in a multitude of areas, ensuring that reviews are fast, fair and performed by experts in all sub-disciplines of smart materials, systems and structures. A smart material is defined as any material that is capable of being controlled such that its response and properties change under a stimulus. A smart structure or system is capable of reacting to stimuli or the environment in a prescribed manner. SMS is committed to understanding, expanding and dissemination of knowledge in this subject matter.