首页|用于测量材料介电常数的高精度微波传感器

用于测量材料介电常数的高精度微波传感器

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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2GHz;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.
High-precision microwave sensor for permittivity measuring of materials
A micro wave sensor for permittivity measuring of materials is presented.It is characterized by low cost and high measurement precision.The optimal design is carried out on the traditional complementary split ring structure to achieve wider measurement area,and a metal through-hole structure is loaded onto the sensor to limit the electric field in the measurement area and achieve a better measurement effect.The results show that the measurement sensitivity of the sensor is 2.89％.When the sensor is unloaded,the resonant frequency is 2 GHz.When the sample is loaded into the measurement area,the electric field in the measurement area will change,resulting in frequency shift.The samples with permittivity values of 1～10 are selected for simulated loading test,and the fitting empirical relationship between permittivity and resonant frequency is obtained,which is verified by five common high-frequency plates.The results show that the sensor has high measurement precision and the overall measurement error is 0.8％,which proves the feasibility of using the sensor to measure the permittivity of materials.

permittivitycomplementary split resonant ring(CSRR)resonant frequencysolid materialstransmission coefficientsensitivity

韩雪云、李肖松、周应平

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河南师范大学电子与电气工程学院,河南新乡 453007

介电常数 互补开口谐振环 谐振频率 固体材料 传输系数 灵敏度

河南省教育厅高等学校重点科研项目河南省教育厅高等学校重点科研项目河南省科技厅科技攻关项目河南省科技厅科技攻关项目

22A51000722A430025202102210316212102210218

2024

10.13873/J.1000-9787(2024)01-0084-04

传感器与微系统
中国电子科技集团公司第四十九研究所

传感器与微系统

CSTPCD北大核心
影响因子：0.61
ISSN：1000-9787
年,卷(期)：2024.43(1)
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