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首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >Meander-Line Slot-Loaded High-Sensitivity Microstrip Patch Sensor Antenna for Relative Permittivity Measurement
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Meander-Line Slot-Loaded High-Sensitivity Microstrip Patch Sensor Antenna for Relative Permittivity Measurement

机译：曲折线槽式高灵敏度微带贴片传感器天线用于相对介电常数测量

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摘要

A high-sensitivity microstrip patch sensor antenna (MPSA) loaded with a meander-line slot (MLS) is proposed for the measurement of relative permittivity. The proposed MPSA was designed by etching the MLS along the radiating edge of the patch antenna, and it enhanced the relative permittivity sensitivity with an additional effect of miniaturization in the patch size by increasing the slot length. The sensitivity of the proposed MPSA was compared with that of a conventional rectangular patch antenna and a rectangular slit (RS)-loaded MPSA, by measuring the shift in the resonant frequency of the input reflection coefficient. Three MPSAs were designed and fabricated on a 0.76 mm-thick RF-35 substrate to resonate at 2.5 GHz under unloaded conditions. Sensitivity comparison was performed by using five different standard dielectric samples with dielectric constants ranging from 2.17 to 10.2. The experiment results showed that the sensitivity of the proposed MPSA is 6.84 times higher for a low relative permittivity of 2.17, and 4.57 times higher for a high relative permittivity of 10.2, when compared with the conventional MPSA. In addition, the extracted relative permittivity values of the five materials under tests showed good agreement with the reference data.
机译：提出了一种装有曲折线缝隙（MLS）的高灵敏度微带贴片传感器天线（MPSA），用于测量相对介电常数。所提议的MPSA是通过沿贴片天线的辐射边缘蚀刻MLS来设计的，它通过增加缝隙长度来增强相对介电常数灵敏度，并具有使贴片尺寸小型化的附加效果。通过测量输入反射系数谐振频率的偏移，将拟议的MPSA的灵敏度与传统的矩形贴片天线和矩形缝隙（RS）加载的MPSA的灵敏度进行了比较。在0.76 mm厚的RF-35基板上设计和制造了三个MPSA，以在空载条件下以2.5 GHz的频率谐振。通过使用五个介电常数范围为2.17至10.2的不同标准介电样品进行灵敏度比较。实验结果表明，与常规MPSA相比，所建议的MPSA在2.17的低相对介电常数下的灵敏度高6.84倍，而在10.2的高相对介电常数下则高4.57倍。此外，五种被测材料的相对介电常数的提取值与参考数据吻合良好。

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