Passive Microwave Substrate Integrated Cavity Resonator for Humidity Sensing
Passive Microwave Substrate Integrated Cavity Resonator for Humidity Sensing
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DOI：
10.1109/tmtt.2015.2495346
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发表时间：
2015-12-01
影响因子：
4.3
通讯作者：
Domingue, Frederic
中科院分区：
文献类型：
--
作者：
El Matbouly, Hatem;Boubekeur, Naimi;Domingue, Frederic
本文提出了一种新颖的无源微波基片集成谐振腔（基片集成波导）作为湿度检测的环境传感器。所提出的结构是基于高品质因数（Q类似于300）的基板集成腔谐振器工作在3.6和4.15 GHz。检测原理基于由于湿空气的介电常数变化而引起的频率偏移。这种变化可以被检测到并用作传感器指示。频率偏移已估计分析使用的谐振器原型的介电扰动方法。所提出的基片集成波导谐振器的结构已在湿度的存在下进行了测试，并根据所提出的模型在0%-80%的相对湿度范围内显示出敏感特性。新结构和其他报道的环境传感微波元件之间的灵敏度性能的比较。测量所提出的结构的重复性和可靠性进行了讨论。基片集成环境传感器作为一种新型的微波器件，为射频环境传感提供了一种新的制作方案，大大简化了传感器的制作工艺和成本。
This paper presents an original passive microwave substrate integrated cavity resonator [substrate integrated waveguides (SIWs)] as an environment sensor for humidity detection. The proposed structures are based on a high quality factor (Q similar to 300) substrate integrated cavity resonator operating at 3.6 and 4.15 GHz. The detection principle is based on a frequency shift due to the permittivity variation of the humid air. This variation can be detected and used as the sensor indication. The frequency shift has been estimated analytically using the dielectric perturbation method for the resonator prototypes. The structure of the presented SIW resonators has been tested in the presence of humidity and shows sensitive characteristics in the range of 0%-80% relative humidity in accordance with the proposed model. A comparison of sensitivity performance between the new structure and other reported microwave components for environmental sensing is also presented. Measurements of repeatability and reliability for the proposed structure are discussed as well. As a new microwave component type, the proposed substrate integrated environmental sensor has the advantage of providing a new fabrication solution for radio frequency environmental sensing and greatly simplifies the sensor's manufacturing processes and cost.