A Lightweight, Zero-Power Intermodulation Sensor Based on the Graphene Oscillator
A Lightweight, Zero-Power Intermodulation Sensor Based on the Graphene Oscillator
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DOI：
10.1109/jsen.2022.3227891
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发表时间：
2023-02
影响因子：
4.3
通讯作者：
Minye Yang;Zhilu Ye;Chia-Heng Sun;Liang Zhu;M. Hajizadegan;Pai-Yen Chen
中科院分区：
文献类型：
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作者：
Minye Yang;Zhilu Ye;Chia-Heng Sun;Liang Zhu;M. Hajizadegan;Pai-Yen Chen
无线传感器网络（WSNs）需要大量的传感器节点用于数据收集和存储，电池供电的传感器的功率管理和区域效率可能是一个问题。在这篇文章中，我们提出并数值研究了一个完全无源和轻量级的互调传感器的基础上可重构的石墨烯场效应晶体管（GFET）振荡器和无源混频器。基于GFET的自供电振荡器的输出频率可能对由带电表面吸收剂、反应气体、污染物或水溶液引起的表面掺杂效应敏感。在互调传感器中，由GFET振荡器产生的低频信号与入射的射频（RF）波混合，形成重传和RF互调信号。由于互调产物不会扰乱接收信号，因此可以有效地抑制不需要的杂波、自干扰和干扰。我们的研究结果表明，GFET振荡器的输出频率可以敏感地响应带电分子，这种信息可以编码在后向散射互调信号。我们相信，我们基于GFET的互调传感器可能有利于各种物联网（IoT），遥感和环境监测应用。
Wireless sensor networks (WSNs) require a massive number of sensor nodes for data collection and storage, for which the power management and area efficiency of battery-powered sensors may be an issue. In this article, we propose and numerically study a fully passive and lightweight intermodulation sensor based on the reconfigurable graphene field-effect transistors (GFETs) oscillator and passive frequency mixer. The output frequency of the self-powered GFET-based oscillator can be sensitive to the surface doping effect caused by charged surface absorbates, reactive gases, contaminations, or aqueous solutions. In the intermodulation sensor, the low-frequency signals generated by GFET oscillator are mixed with the incident radio frequency (RF) waves, forming the retransmitted and the RF intermodulation signals. Since the intermodulation products do not mess up with the reception signal, the unwanted clutters, self-jamming, and interferences can be effectively suppressed. Our results show that the output frequency of the GFET oscillator can sensitively respond to charged molecules, and such information can be encoded in the backscatter intermodulation signal. We believe that our GFET-based intermodulation sensor may be beneficial for a variety of the Internet of Things (IoTs), remote sensing, and environment monitoring applications.