电子测量与仪器学报

陶永强,程勇.互补分裂谐振环缺陷地结构的平面传感器[J].电子测量与仪器学报,2025,39(12):270-278

互补分裂谐振环缺陷地结构的平面传感器

Planar sensor with complementary split-ring resonant defect ground structure

DOI：

英文关键词:complementary split resonant rings defective ground structure split resonant ring dielectric properties of materials microwave sensors

基金项目:

作者	单位
陶永强	南京邮电大学电子与光学工程学院、柔性电子（未来技术）学院南京210023
程勇	南京邮电大学电子与光学工程学院、柔性电子（未来技术）学院南京210023

Author	Institution
Tao Yongqiang	College of Electronic and Optical Engineering & College of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications, Nanjing 210023, China
Cheng Yong	College of Electronic and Optical Engineering & College of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications, Nanjing 210023, China

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中文摘要:

为实现多形态介质材料介电特性的精确区分与测量，设计了一种基于互补分裂谐振环缺陷地结构（complementary split resonator ring-defected ground structure, CSRR-DGS）的微波平面传感器，该传感器通过CSRR-DGS的独特设计，显著增强了局部电场强度，与传统的平面结构相比，该传感器的品质因数提升了51.1%，提高了传感器的检测性能，能够实现对固体和液体介质的准确检测。仿真结果表明，在传感器的待测区域放置4 mm×4 mm×1 mm的立方体样品，且相对介电常数在1~15范围内变化时，传感器的谐振频率呈现良好的线性响应特性。通过测量聚四氟乙烯（polytetrafluoroethylene, PTFE）、3240环氧板、FR4玻璃纤维板以及丙烯腈-丁二烯-苯乙烯共聚物(acrylonitrile-butadiene-styrene, ABS)树脂板的相对介电常数，所得结果与仿真数据具有良好的一致性。基于建立的数学模型分析得出固体介质的测量平均相对误差为2.4%。通过测量不同浓度乙醇溶液，建立溶液浓度与相对频偏之间的关系，由此计算出乙醇溶液的测量平均相对误差为4.6%。实验结果表明，所设计的传感器在介电特性测量中具有优异的性能，为多形态介质的高精度检测提供了有效的解决方案。

英文摘要:

To achieve precise discrimination and measurement of dielectric properties for multi-form materials, this study proposes a microwave planar sensor based on a complementary split-ring resonator-defected ground structure (CSRR-DGS), whose unique configuration significantly enhances localized electric field intensity, resulting in a 51.1% improvement in quality factor compared to conventional planar structures, enabling accurate measurements for both solid and liquid dielectrics. Simulation results demonstrate that when testing 4 mm×4 mm×1 mm cubic samples with relative permittivity ranging from 1 to 15, the sensor exhibits excellent linear response characteristics in resonant frequency, which was experimentally validated through measurements of polytetrafluoroethylene (PTFE), 3240 epoxy board, FR4 fiberglass laminate, and acrylonitrile-butadiene-styrene (ABS) resin, showing strong agreement with simulation data and yielding an average relative error of 2.4% for solid dielectric measurements based on the established mathematical model. Furthermore, characterization of ethanol solutions with varying concentrations established a reliable correlation between solution concentration and relative frequency shift, achieving an average relative error of 4.6% for liquid dielectric measurements, collectively demonstrating the sensor′s outstanding performance in dielectric characterization and its effectiveness as a high-precision solution for multi-form material detection.

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