Frequency-Diverse Reflection Metasurface Antenna Design for Computational Microwave Imaging

IF 3.5 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE Open Journal of Antennas and Propagation Pub Date : 2024-03-18 DOI:10.1109/OJAP.2024.3377368
Aobo Li;Mengran Zhao;Dónal Patrick Lynch;Shitao Zhu;Muhammad Ali Babar Abbasi;Okan Yurduseven
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Abstract

In this paper, the design of a computational microwave imaging (CMI) oriented frequency-diverse reflection metasurface antenna (FDRMA) is presented. Designing a FDRMA for CMI requires a careful synthesis framework, from the topology of metamaterial elements to the statistical analyses of the metasurface and the evaluation of its CMI performance. Consequently, we begin with an investigation of different metamaterial element topologies with the aim to choose the optimal one to constitute a desired reflection metasurface. The FDRMA is then designed by randomly distributing the metamaterial elements with diverse structural parameters. The orthogonality of the reflected field patterns is investigated by means of a spatial-correlation evaluation and a singular value decomposition. To mitigate random errors, each type of FDRMA is replicated 20 times, and the evaluation indexes are averaged. Finally, the CMI experiments are carried out through full-wave simulations using different FDRMAs to verify their computational imaging performance. Moreover, a prototype of the optimal FDRMA topology is fabricated and real CMI experiments are implemented to validate the proposed design method.
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用于计算微波成像的频率多样化反射元面天线设计
本文介绍了面向计算微波成像(CMI)的频率多样化反射超表面天线(FDRMA)的设计。设计用于 CMI 的 FDRMA 需要一个仔细的综合框架,从超材料元素的拓扑结构到元表面的统计分析以及其 CMI 性能的评估。因此,我们首先对不同的超材料元件拓扑结构进行研究,目的是选择最佳拓扑结构来构成所需的反射超表面。然后,通过随机分布具有不同结构参数的超材料元素来设计 FDRMA。通过空间相关性评估和奇异值分解,研究了反射场模式的正交性。为减少随机误差,每种 FDRMA 均重复 20 次,并对评估指标求平均值。最后,通过使用不同的 FDRMA 进行全波仿真,进行 CMI 实验,以验证其计算成像性能。此外,还制作了最佳 FDRMA 拓扑的原型,并进行了实际的 CMI 实验,以验证所提出的设计方法。
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CiteScore
6.50
自引率
12.50%
发文量
90
审稿时长
8 weeks
期刊最新文献
Front Cover Table of Contents IEEE Open Journal of Antennas and Propagation Instructions for authors Guest Editorial: Antenna-Enabled Sensors and Systems, the New Frontier in Sustainable Wireless Systems IEEE ANTENNAS AND PROPAGATION SOCIETY
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