河南师范大学电子与电气工程学院
纸质出版:2024
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韩雪云, 李肖松, 周应平. 用于测量材料介电常数的高精度微波传感器[J]. 传感器与微系统, 2024,(1):84-87.
韩雪云, 李肖松, 周应平. 用于测量材料介电常数的高精度微波传感器[J]. 传感器与微系统, 2024,(1):84-87. DOI: 10.13873/J.1000-9787(2024)01-0084-04.
提出了一种用于测量材料介电常数的微波传感器,其特点是成本低、测量精度高。在传统的互补裂环结构上进行优化设计,实现了更大范围的测量区域;并加载了金属通孔结构,将电场限制在测量区域内,达到了更好的测量效果。结果显示传感器的测量灵敏度为2.89%。传感器在空载时谐振频率为2 GHz;当样品加载到测量区域时,测量区域的电场将发生变化,从而导致频移。选取了介电常数值为1~10的样品进行了模拟加载试验,得到了介电常数与谐振频率的拟合经验关系式,同时采用5种常见的高频板材对拟合公式进行了验证。结果表明:传感器具有很高的测量精度,整体测量误差为0.8%
证实了利用该传感器测量材料介电常数的可行性。
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