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首页> 外文期刊>Journal of Microwaves, Optoelectronics and Electromagnetic Applications >Investigation of Thermal Effects in Coaxial Probe Method and Dielectric Characterization of Glycerol up to 140°C
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Investigation of Thermal Effects in Coaxial Probe Method and Dielectric Characterization of Glycerol up to 140°C

机译：同轴探针法中热效应的研究以及甘油在140°C以下的介电特性

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摘要

Dielectric properties of a material are of paramount importance in many areas of knowledge. All scientific fields that deal with the interaction of electromagnetic radiation with matter demand this information. Consequently, suitable methods for obtaining accurate dielectric data are required. In the microwave community, the dielectric metrology with the coaxial probe method is well known due to its simplicity and practicality. It is also pointed out as a broadband and wide temperature range technique. Despite this, a detailed study of the implications of thermal effects at calibration with this technique has not been plainly reported in the literature. In the present work, a concise exposition of the problem is made. Using air, short and water as standards, we have analyzed a set of calibration procedures with different thermal conditions and compared them with the isothermal case. With the aid of statistical analysis, we have made recommendations for precise and accurate dielectric measurements at high temperatures. Using glycerol as material under test (MUT) we also demonstrated that measurements at temperatures up to 50°C above the calibration temperature can provide reliable data. Thus, measurements of glycerol up to 140°C were performed by calibrating the system with water at 90°C. This important issue was raised due to the lack of standard material data in the literature for temperatures above 100°C. From the measured data we also have derived the Cole-Davidson model parameters of glycerol from 30 to 140°C.
机译：在许多知识领域，材料的介电特性至关重要。处理电磁辐射与物质相互作用的所有科学领域都需要此信息。因此，需要用于获得准确的介电数据的合适方法。在微波界，同轴探针法的介电计量因其简单性和实用性而众所周知。还指出了宽带和宽温度范围技术。尽管如此，在文献中还没有明确报道过使用这种技术进行校准时对热效应的影响的详细研究。在当前的工作中，对问题进行了简要的阐述。以空气，短路和水为标准，我们分析了一组在不同热条件下的校准程序，并将其与等温情况进行了比较。借助统计分析，我们提出了在高温下进行精确和精确电介质测量的建议。使用甘油作为被测材料（MUT），我们还证明了在比校准温度高50°C的温度下进行的测量可以提供可靠的数据。因此，通过在90°C的水中校准系统来进行高达140°C的甘油的测量。由于文献中缺乏有关100°C以上温度的标准材料数据，因此提出了这个重要问题。从测量的数据中，我们还得出了30至140°C的甘油的Cole-Davidson模型参数。

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