Frequency-Diverse Metasurface Antenna for Computational Through-Wall Imaging
Frequency-Diverse Metasurface Antenna for Computational Through-Wall Imaging
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DOI：
10.23919/eucap57121.2023.10133569
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发表时间：
2023-03
期刊：
影响因子：
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通讯作者：
M. García-Fernández;G. Álvarez-Narciandi;O. Yurduseven
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文献类型：
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作者：
M. García-Fernández;G. Álvarez-Narciandi;O. Yurduseven
计算成像已成为一种有前途的范例，用于克服基于光栅扫描的传统雷达系统的一些缺陷。这种方法依赖于使用压缩天线，这些天线辐射准随机的空间不相干模式，进而能够将来自成像场景的信息压缩到单个通道（或数量减少的通道）中。尽管计算成像在多个自由空间应用（例如人员安检）中取得了成功，但其在穿墙成像场景中的应用却鲜有探索。本文介绍了一种工作在X波段的频率分集天线，用于进行穿墙计算成像。首先，我们表明所设计的天线根据频率辐射出不同的模式，这对于实现物理层压缩至关重要。然后，我们证明了在应用杂波去除技术以减轻墙壁反射的情况下，这种天线能够检测隐藏在墙壁后面的目标。
Computational imaging has emerged as a promising paradigm to overcome some drawbacks of conventional radar systems based on raster scanning. This approach relies on using compressive antennas that radiate quasi-random spatially-incoherent patterns, which in turn enables to compress the information from the imaged scene into a single channel (or a reduced number of channels). Despite the success of computational imaging for multiple free-space applications (such as personnel screening), its extension to deal with through-wall imaging scenarios has been hardly explored. This contribution presents a frequency-diverse antenna working at X-band to perform through-wall computational imaging. First, we show that the designed antenna radiates distinct patterns as a function of frequency, which is essential to achieve physical layer compression. Then, we demonstrate the capability of this antenna to detect targets hidden behind a wall, provided that a clutter removal technique is applied to mitigate the wall reflection.