Conformal Frequency-Diverse Metasurface for Computational AoA Detection
Conformal Frequency-Diverse Metasurface for Computational AoA Detection
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DOI：
10.1109/lawp.2023.3312041
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发表时间：
2023-11
影响因子：
4.2
通讯作者：
M. Imani;Idban Alamzadeh
中科院分区：
文献类型：
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作者：
M. Imani;Idban Alamzadeh
检测电磁波的到达角（AoA）是诸如导航和无线通信的各种应用中的重要功能。在这封信中，我们提出了一个共形的超颖表面天线（CMA）检测的AoA在水平面上。该结构由共形波导组成，其上导体壁由超材料辐射器形成。超材料辐射器的谐振频率在工作频带上随机选择。谐振频率的随机分布导致随频率变化的图案，并且将关于入射信号的AoA的信息编码到频率样本中，可以分析频率样本以检索入射AoA。使用全波仿真，我们详细的设计和操作的建议频率多样的CMA。我们开发和数值演示的计算处理技术来估计的AoA的信号在同轴连接器连接到CMA的端部的互相关。将说明频点数量、带宽和噪声对设备性能的影响。所提出的设备承诺一个简单的和通用的硬件，可以检测到从一个单一的接收器的AoA，并可以在无线通信，监视和导航系统中找到应用。
Detecting the angle of arrival (AoA) of electromagnetic waves is an important function in a variety of applications, such as navigation and wireless communication. In this letter, we propose a conformal metasurface antenna (CMA) for detecting the AoA in the horizontal plane. This structure consists of a conformal waveguide with its upper conductor wall fashioned with metamaterial radiators. The resonance frequencies of the metamaterial radiators are selected randomly over a band of operation. The random distribution of resonance frequencies results in patterns that change with frequency and encode information about the AoA of an incident signal into frequency samples, which can be analyzed to retrieve the incident AoA. Using full-wave simulation, we detail the design and operation of the proposed frequency-diverse CMA. We develop and numerically demonstrate a computational processing technique to estimate the AoA from the cross correlation of the signals at the end of coaxial connectors attached to the CMA. The impact of the number of frequency points, bandwidth, and noise on the performance of the device will be illustrated. The proposed device promises a simple and versatile hardware that can detect the AoA from a single receiver and can find application in wireless communication, surveillance, and navigation systems.