This paper presents a miniaturized patch antenna sensor for structural crack sensing, and the patch antenna sensor can be interrogated wirelessly. The proposed patch antenna sensor can detect the expansion of structural crack through relative movement between antenna components, and the relationships between the antenna resonant frequency and the crack width were studied. By using Rogers RO3010 laminate with high dielectric constant as the dielectric substrate of the antenna, the size of the proposed antenna sensor is significantly reduced, and higher sensing sensitivity is achieved. Furthermore, the wireless interrogation methods of the patch antenna sensor were also studied. The resonant frequency of the patch antenna sensor was wirelessly interrogated using linearly polarized wide-band antennas. Compared with the previous patch antenna sensor, the overall area of the proposed antenna sensor has been reduced to 33.4%, and the miniaturized patch antenna sensor shows a sensing sensitivity of 116.1 MHz/mm, which is 2.6 times higher than the previous patch antenna sensor. A series of simulations and experiments have demonstrated the feasibility of the proposed patch antenna sensor for structural crack sensing and the effectiveness of wireless interrogation methods.

中文翻译：

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用于结构裂纹传感的小型无源无线贴片天线传感器

本文提出了一种用于结构裂纹传感的小型化贴片天线传感器，并且该贴片天线传感器可以进行无线询问。所提出的贴片天线传感器可以通过天线组件之间的相对运动来检测结构裂纹的扩展，并研究了天线谐振频率与裂纹宽度之间的关系。通过使用高介电常数的罗杰斯RO3010层压板作为天线的介电基板，所提出的天线传感器的尺寸显着减小，并且实现了更高的传感灵敏度。此外，还研究了贴片天线传感器的无线询问方法。使用线性极化宽带天线无线询问贴片天线传感器的谐振频率。与之前的贴片天线传感器相比，所提出的天线传感器的整体面积减少到33.4%，并且小型化贴片天线传感器的传感灵敏度为116.1 MHz/mm，比之前的贴片天线传感器高2.6倍。一系列的仿真和实验证明了所提出的贴片天线传感器用于结构裂纹传感的可行性以及无线询问方法的有效性。