太赫兹科学与电子信息学报2024，Vol.22Issue(1)：62-67,6.DOI:10.11805/TKYDA2021395
平板介质的微波分裂腔法介电常数测试技术
Permittivity measurement technology of flat dielectrics using microwave split-cavity method
王益 1张翠翠 1于明媚 1王建忠1
作者信息
- 1. 中国工程物理研究院 计量测试中心,四川 绵阳 621999
- 折叠
摘要
Abstract
The test method of split cylindrical resonator is studied in order to realize the nondestructive test of dielectric constant of flat dielectric materials in microwave band.The electromagnetic field analysis theory of split cylindrical resonator is introduced,and the accurate solution of electromagnetic field distribution in the cavity under dielectric loading is realized by using mode matching technology.The exact relationship between the resonant frequency of the cavity and the dielectric constant of the material is obtained.On the basis of theoretical analysis,a split resonator with cavity resonant frequency of 10 GHz is fabricated and compared with the previously developed closed resonator.The relative error of the measurement results of the real part of dielectric constant is less than 1%.Compared with similar foreign products,the real results of dielectric constant are basically consistent,and the measurement result of loss tangent of this device is closer to the reference value.Therefore,the microwave split cavity method can realize the nondestructive measurement of flat dielectric plates,with outstanding advantages such as high accuracy and convenient use.It can accurately test the dielectric constants of various flat dielectric materials with dielectric constant range of 1～20,tangent of loss angle 1×10-3～1×10-5 and plate thickness of 0.1～2.0 mm in the microwave frequency band.关键词
分裂式谐振腔/介电常数测量/平板介质材料/损耗角正切Key words
split-cylinder cavity/permittivity measurement/flat dielectric material/tangent of loss angle分类
信息技术与安全科学引用本文复制引用
王益,张翠翠,于明媚,王建忠..平板介质的微波分裂腔法介电常数测试技术[J].太赫兹科学与电子信息学报,2024,22(1):62-67,6.
