Experimental study on textile properties for wearable absorber using cavity method

The information of textile properties is one of important things in the design of wearable absorber. In this paper, the experimental study of textile properties focused on its relative permittivity is presented based on the cavity reflection transmission-perturbation method. The technique that utilizes a rectangular waveguide is expected to produce high accuracy of property measurement since it combines the reflection-transmission method and cavity perturbation method. Prior to the textile relative permittivity measurement, the proposed method is numerically analyzed and then experimentally examined for some known dielectric materials. From the characterization, the measurement result of relative permittivity for some textiles has some differences which depend on the raw material of each textile. It shows that the proposed method is suitable for the measurement of textile properties which are useful in the design of wearable absorber.