Dielectric response measurement is a widely used technique for characterising dielectric materials in terms of their capacitance and dielectric loss. However, the widely used approach with contact between samples and electrodes can in some cases limit the accuracy of the measurement. The authors introduce an easily realised electrode arrangement for non-contact measurements, which avoids these contact problems. The performance of the electrode arrangement in terms of the edge effect is assessed. The non-contact and contact methods are compared based on error-sensitivity analysis and experimental results. Differences are studied further, with attention to contact pressure. The non-contact method is also compared experimentally with the one-sided non-contact method. Air-reference measurements, comparing the sample to an air-gap for improved calibration, are used for all measurements. The results show that the non-contact method can be an alternative to reduce contact problems between the sample and electrodes, although error sensitivity can be higher when the non-contact method is used. The non-contact method can decrease the influence of the pressure applied to the sample compared to the contact method, and can also reduce the problem of poor contact that can arise from the absence of pressure in the one-sided non-contact method.

介电响应测量是一种根据介电材料的电容和介电损耗来表征介电材料的广泛使用的技术。但是，在某些情况下，样品和电极之间接触的方法广泛使用会限制测量的准确性。作者介绍了一种易于实现的用于非接触式测量的电极装置，从而避免了这些接触问题。评估电极装置在边缘效应方面的性能。根据误差敏感性分析和实验结果，比较了非接触和接触方法。进一步研究差异，并注意接触压力。还通过实验将非接触方法与单面非接触方法进行了比较。空气参考测量 将样品与气隙进行比较以改进校准，用于所有测量。结果表明，尽管使用非接触方法时误差敏感性可能更高，但非接触方法可以替代减少样品与电极之间的接触问题。与接触方法相比，非接触方法可以减小施加到样品上的压力的影响，并且还可以减少单面非接触方法中由于没有压力而引起的接触不良的问题。