Model-Based Microwave Dielectroscopy of Fluids With Impedance Sensors
Model-Based Microwave Dielectroscopy of Fluids With Impedance Sensors
复制标题
使用阻抗传感器进行基于模型的流体微波介电检查
DOI：
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复制
发表时间：
2020
影响因子：
4.3
通讯作者：
A. Jacob
中科院分区：
文献类型：
--
作者：
A. Savić;N. Meyne;A. Jacob
报道了一种利用电小阻抗传感器提取流体宽带介电常数的方法。它依赖于传感器的等效电路模型，该模型考虑了最显著的寄生效应。它假定传感器的固有电纳和电导分别与介电常数的实部和虚部呈线性关系。该方法的简单性便于校准。除了定义参考平面的传统透反射线标准外，只需要空气和单一参考液体。该方法适用于三种不同的设备，即：一个普通的开放式同轴线，一个紧凑的印刷电路板设计，以及一个集成的微芯片传感器，分别用于（毫）升，微升和皮升的样品体积。它显示了如何确定频率限制，以及如何根据模型参数最大化灵敏度。该方法对生产公差具有鲁棒性。
A broadband permittivity extraction method for fluids by means of electrically small impedance sensors is reported. It relies on an equivalent circuit model of the sensors, which takes into account the most significant parasitic effects. It assumes the sensor’s intrinsic susceptance and conductance to depend linearly on the real and the imaginary part of the permittivity, respectively. The simplicity of the approach eases calibration. Besides conventional thru-reflect-line standards, which define the reference plane, only air and a single reference liquid are needed. The method is applied to three different devices, namely, a common open-ended coaxial line, a compact printed circuit board design, and an integrated microchip sensor for (milli-)liter, microliter, and picoliter sample volumes, respectively. It is shown how the frequency limits can be determined, and how the sensitivity can be maximized in terms of the model parameters. The method is shown to be robust against production tolerances.
DOI：
10.1109/tmtt.2018.2851251
发表时间：
2018-08-01
影响因子：
4.3
作者：
Ma, Xiao;Du, Xiaotian;Hwang, James C. M.
通讯作者：
Hwang, James C. M.