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CSRR-Based Microwave Sensor for Dielectric Materials Characterization Applied to Soil Water Content Determination

机译：基于CSRR的介电材料表征微波传感器用于土壤水分测定

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摘要

A new and compact sensor based on the complementary split-ring resonator (CSRR) structure is proposed to characterize the relative permittivity of various dielectric materials, enabling the determination of soil water content (SWC). The proposed sensor consists of a circular microstrip patch antenna supporting a 3D-printed small cylindrical container made out of Acrylonitrile-Butadiene-Styrene (ABS) filament. The principle of operation is based on the shifting of two of the antenna resonant frequencies caused by changing the relative permittivity of the material under test (MUT). Simulations are performed enabling the development of an empirical model of analysis. The sensitivity of the sensor is investigated and its effectiveness is analyzed by characterizing typical dielectric materials. The proposed sensor, which can be applied to characterize different types of dielectric materials, is used to determine the percentage of water contained in different soil types. Prototypes are fabricated and measured and the obtained results are compared with results from other research works, to validate the proposed sensor effectiveness. Moreover, the sensor was used to determine the percentage of water concentration in quartz sand and red clay samples.
机译：提出了一种基于互补开口环谐振器（CSRR）结构的新型紧凑型传感器，以表征各种介电材料的相对介电常数，从而能够确定土壤含水量（SWC）。拟议中的传感器由圆形微带贴片天线组成，该天线支持3D打印的由丙烯腈-丁二烯-苯乙烯（ABS）灯丝制成的小圆柱形容器。工作原理基于改变被测材料（MUT）的相对介电常数引起的两个天线谐振频率的偏移。通过执行仿真，可以开发经验分析模型。研究了传感器的灵敏度，并通过表征典型的介电材料来分析其有效性。所提出的传感器可用于表征不同类型的介电材料，用于确定不同土壤类型中所含水分的百分比。制造并测量原型，并将获得的结果与其他研究工作的结果进行比较，以验证所提出的传感器的有效性。此外，该传感器用于确定石英砂和红粘土样品中水浓度的百分比。

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