A 10 GHz Metamaterial Sensor to Detect SARS COV-2 and Dust Particles in Free Space
A 10 GHz Metamaterial Sensor to Detect SARS COV-2 and Dust Particles in Free Space
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DOI：
10.1109/jsen.2022.3178049
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发表时间：
2022-07
影响因子：
4.3
通讯作者：
M. Tabib-Azar;Mohammad Ashif Hossain Chowdhury
中科院分区：
文献类型：
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作者：
M. Tabib-Azar;Mohammad Ashif Hossain Chowdhury
设计、制造和测试了一种X波段自由空间微波传感器，该传感器由30个径向辐条组成，辐条连接在一个带有间隙区域的中心毂中。传感器结构导致在10 GHz的电偶极子与分裂的圆盘电容器在中心。差距区域中的病毒、灰尘和烟尘颗粒会改变传感器的阻抗及其反射系数，并通过喇叭天线和网络分析仪进行监测。传感器的灵敏度为85.02 MHz/微升的去离子水，89.5 MHz/微升的未感染的唾液，94.6 MHz/微升的SARS-COV-2感染的唾液与103病毒/ $\mu \text{L}$。它的灵敏度为3.23 MHz/mm 3的电介质样品（$\vareptagrapho_{\rho }\sim 5.84$），为16.25 MHz/mm 3的铁颗粒。所有这些样品在10 GHz时都小于$\lambda $ /30，并且在没有轮辐结构的均匀电介质或金属衬底上无法检测到。作为设计更大的超材料（MTM）周期性阵列的可行性研究，还构建了一个2 × 2的轮辐传感器阵列并进行了测试。
An X-band, free-space microwave sensor consisting of 30 radial spokes connected in a central hub with a gap region was designed, fabricated and tested. The sensor structure results in an electric dipole at 10 GHz with a split circular disc capacitor at the center. Viruses, dust, and soot particles in the gap region change the sensor’s impedance and its reflection coefficient monitored by a horn antenna and a network analyzer. The sensor sensitivity was 85.02 MHz/microliter for deionized water, 89.5 MHz/microliter for uninfected saliva, and 94.6 MHz/microliter for SARS-COV-2 infected saliva with 103 viruses/ $\mu \text{L}$ . Its sensitivity to a dielectric sample ( $\varepsilon _{\rho }\sim 5.84$ ) was 3.23 MHz/mm3, and for iron particles was 16.25 MHz/mm3. All these samples were smaller than $\lambda $ /30 at 10 GHz and could not be detected on uniform dielectric or metallic substrates without the spoke structure. A $2\times 2$ array of spoke sensors was also constructed and tested as a feasibility study for designing larger metamaterial (MTM) periodic arrays.