利用微波范围内反射系数和透射系数的频率依赖性估计材料的复介电常数

D. V. Perov
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引用次数: 0

摘要

微波范围的电磁波是解决介电、半导体、复合材料、铁氧体产品无损检测和诊断问题的有效工具。本文提出了一种计算非磁性材料复介电常数的算法,该算法利用微波范围内的电磁波与封闭矩形波导截面上的片状样品相互作用时反射系数和透射系数量级的频率依赖性来估计非磁性材料的复介电常数。采用统计分析方法对该算法在应用过程中由于波导测量路径与标量电路分析仪的接收机和发生器不完全匹配而产生的误差进行了评估。结果表明,该算法利用宽频率范围内反射系数和透射系数的测量结果,可以显著降低频率相关测量误差对复介电常数估计精度的影响。该算法的另一个优点是它的实现不需要矢量网络分析仪,这是非常昂贵的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Estimating complex dielectric permittivity of materials by the frequency dependences of reflection and transmission coefficient magnitudes in the microwave range
Electromagnetic waves of the microwave range are an effective tool for solving problems of non-destructive testing and diagnostics as applied to dielectric, semiconductor, and composite materials, ferrite products. An algorithm is suggested for estimating the complex permittivity of non-magnetic materials by the frequency dependences of reflection and transmission coefficient magnitudes during the interaction of electromagnetic waves in the microwave range with a sample in the form of a plate located in the cross section of a closed rectangular waveguide. Statistical analysis methods are applied to evaluating the errors arising during the application of this algorithm due to imperfect matching of the waveguide measurement path with the receivers and generator of the scalar circuit analyzer. It is shown that the proposed algorithm using the results of measuring reflection and transmission coefficients in a wide frequency range can significantly reduce the influence of frequency-dependent measurement errors on the accuracy of complex permittivity estimation. An additional advantage of the algorithm is that its implementation does not require vector network analyzers, which are very expensive.
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