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首页> 外文期刊>International journal of RF and microwave computer-aided engineering >Symmetric coplanar waveguide sensor loaded with interdigital capacitor for permittivity characterization
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Symmetric coplanar waveguide sensor loaded with interdigital capacitor for permittivity characterization

机译：装有叉指电容器的对称共面波导传感器用于介电常数表征

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摘要

This article presents the developing of interdigital capacitor (IDC) based symmetriccoplanar waveguide (CPW) sensor to characterize the complex permittivity ofunknown dielectric sheets. The symmetric structure is realized by using two identical3 dB CPW dividers where each branch is loaded with an IDC unit. The proposedmethod is designed using three, five, and seven fingers of the IDC unit, andthe measurement sensitivity is analyzed accordingly. The permittivity of testedsamples is extracted by the genetic algorithm. To validate the robust sensing performanceof the proposed method, simulation and experimental tests are performedand analyzed, and the accuracy is compared with published values. The proposedmethod gives the maximum error of 3.42%. With the feature of high-sensitivity,the proposed sensor can be used as an excellent candidate for determining the permittivityof materials in microwave frequencies.
机译：本文介绍了基于叉指电容器（IDC）的对称共面波导（CPW）传感器的开发，以表征未知介电片的复介电常数。通过使用两个相同的3 dB CPW分频器来实现对称结构，其中每个分支均装有IDC单元。该方法是使用IDC单元的三个，五个和七个手指设计的，并相应地分析了测量灵敏度。用遗传算法提取被测样品的介电常数。为了验证所提出方法的鲁棒感测性能，进行了仿真和实验测试并进行了分析，并将其准确性与公开的值进行了比较。该方法给出的最大误差为3.42％。该传感器具有高灵敏度的特点，可以作为确定微波频率下材料介电常数的理想选择。

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