The quarter-wavelength-mode has been widely used in microwave absorption material research for many years. Based on wave-cancellation method, it is proved in the first part of this work that the model fails for most cases. It is interesting that the principles underlining this work are not beyond those covered by fundamental college courses even though the improper model has been dominant in the field for long without correction. In the second part of this work, the correctness of results obtained are verified by formulae well-known to material scientists. The improper commonly used practice of characterizing material by reflection loss and impedance matching has been highlighted and replaced by the method of wave-cancellation for film.

四分之一波长模式在微波吸收材料研究中已广泛应用多年。基于波浪抵消法，本文第一部分证明了该模型在大多数情况下是失败的。有趣的是，强调这项工作的原则并没有超出大学基础课程所涵盖的原则，即使不正确的模型在该领域长期占主导地位而没有纠正。在这项工作的第二部分，所得结果的正确性由材料科学家熟知的公式进行验证。通过反射损耗和阻抗匹配来表征材料的不正确的常用做法已被突出并被薄膜的波抵消方法所取代。