论文标题
通过开放式同轴系对生物样品的介电常数测量
Permittivity measurements of biological samples by an open-ended coaxial line
论文作者
论文摘要
我们先前报道了废污泥的复杂介电常数和直流电导率。使用开放端的同轴传输线进行了跨越3 MHz至40 GHz的频率范围的测量值。尽管该技术在文献中已经建立了很好的确定，但我们发现有必要结合几篇论文的方法，以使用开放式同轴探针来可靠地表征具有高直流电导率的生物样品。在这里，我们提供了一组详细和实用的准则，这些准则可用于确定在广泛频率范围内生物样品的介电常数和电导率。由于电极极化效应，导电样品的低频测量需要校正以提取内在的电性能。我们描述了一种实际校正方案，并使用对照样本验证其可靠性。
We previously reported on the complex permittivity and dc conductivity of waste-activated sludge. The measurements, spanning a frequency range of 3 MHz to 40 GHz, were made using an open-ended coaxial transmission line. Although this technique is well established in the literature, we found that it was necessary to combine methods from several papers to use the open-ended coaxial probe to reliably characterize biological samples having a high dc conductivity. Here, we provide a set of detailed and practical guidelines that can be used to determine the permittivity and conductivity of biological samples over a broad frequency range. Due to the electrode polarization effect, low frequency measurements of conducting samples require corrections to extract the intrinsic electrical properties. We describe one practical correction scheme and verify its reliability using a control sample.
