Sensitivity evaluation of dielectric perturbed substrate integrated resonators for hydrogen detection
Sensitivity evaluation of dielectric perturbed substrate integrated resonators for hydrogen detection
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DOI：
10.1016/j.sna.2016.09.042
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发表时间：
2016-11-01
影响因子：
4.6
通讯作者：
Domingue, Frederic
中科院分区：
文献类型：
--
作者：
Ndoye, Majid;El Matbouly, Hatem;Domingue, Frederic
本文介绍了用于气敏应用的衬底集成谐振器（SIW）结构的理论和实验研究。本文的目标是通过基于共振摄动方法的灵敏度分析模型来评估SIW传感器灵敏度的演变，这本质上取决于功能化区域的性质。研究了SIW谐振腔尺寸、相对介电常数和功能区拓扑结构等参数的影响。为了验证理论研究并提出最佳的设计方案以实现灵敏度最大化，制作了不同拓扑结构的SIW传感器并进行了实验测试。SIW谐振器的工作频率在4 ~ 6ghz之间，以氢气作为探测气体。SIW谐振器采用对氢气敏感的介电材料氧化锡（SnO2）微粉进行功能化。因此，该传感器的检测原理是基于氢的存在引起的有效介电常数的变化，其实验结果显示灵敏度范围为8.1至33.9%，这取决于气体传感器的尺寸、相对介电常数或功能化区域的拓扑结构。这个新概念为无源传感器提供了一个低成本的解决方案，可以很容易地集成在PCB制造过程中。(C) 2016 Elsevier B.V.版权所有
This paper presents a theoretical and experimental study of a substrate integrated resonator (SIW) structure for gas sensing applications. The goal of the presented work is to evaluate, via an analytical model of sensitivity based on the resonant perturbation method, the evolution of the sensitivity of SIW sensors, which essentially depends on the properties of the functionalized region. The effect of the SIW resonator parameters, such as the size, the relative permittivity and the topology of the functionalized areas, are studied. In order to validate the theoretical study and propose the best design to maximize the sensitivity, different topologies of SIW sensors are fabricated and tested experimentally. The operation frequency of the SIW resonator is comprised between 4 and 6 GHz, and hydrogen is used as the detection gas. The SIW resonators are functionalized with tin oxide (SnO2) micro powder, which is a dielectric material sensitive to hydrogen gas. Thus, the experimental results of the sensor, whose detection principle is based on the variation of the effective dielectric permittivity caused by the presence of hydrogen, exhibit sensitivities ranging from 8.1 to 33.9%, depending on the size, the relative permittivity or the topology of the functionalized region of the gas sensor. This new concept provides a low-cost solution for passive sensors that can be easily integrated in a PCB fabrication process. (C) 2016 Elsevier B.V. All rights reserved.