In this study, a corrugated substrate-integrated waveguide (CSIW) is used to design a passive microwave displacement sensor. Hence, one of the electric walls of the proposed structure is formed by open-circuited quarter guided wavelength stubs and the other walls are made by metal vias and moveable copper metal is placed on the stubs. By displacing the moveable metal layer along with the stubs, the length of the stubs is changed and therefore the resonant frequency is shifted. An analytical model that relates the variation of the resonant frequency and the displacement has been formulated. The proposed sensor seems like a simple structure and it is operated at 2.4-2.9 GHz. There is a good agreement between the measured results and those obtained by simulation. The measured results indicate that the sensor provides a high dynamic range of displacement of 15 mm and high sensitivity of 25.16 MHz/mm.

中文翻译：

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使用波纹基板集成波导（CSIW）的高灵敏度简单结构位移传感器

在这项研究中，波纹基板集成波导（CSIW）用于设计无源微波位移传感器。因此，所提出的结构的电壁中的一个由开路的四分之一波长引导的短截线形成，而另一壁由金属通孔制成，并且可移动的铜金属被置于短截线上。通过将可移动金属层与短棒一起移动，短棒的长度被改变，因此谐振频率被偏移。已经建立了一个分析模型，该模型将共振频率的变化和位移相关联。拟议中的传感器似乎是一个简单的结构，并在2.4-2.9 GHz下运行。测量结果与通过仿真获得的结果之间有很好的一致性。