On the dispersion property of a plain-weave textile metamaterial

Applications of textile material in electromagnetics have been an active research area in the past decade. Numerous researches of antennas and other electromagnetic structures based on textile metamaterials have been presented. However, not much in-depth study of the impact of the periodic nature of textiles on electromagnetic band gap (EBG) properties has been done. In this study, a planar artificial magnetic conductor (AMC) / artificial electric conductor (AEC) grating structure and a conductive/nonconductive textile EBG structure are modeled and analyzed using the CST Microwave Studio eigenmode Jacobi-Davidson (JDM) method. The AMC/AEC grating and the textile EBG models have the same design parameters, but the dispersion results show that the periodic nature of the textile structure is able to split the TM/TE band and creates a bandgap for the X to M wave vectors. As a result, by introducing a plain weave structure, the AMC/AEC grating is transformed from a 1D EBG into a 2D EBG structure. A distributed parameter transmission line model is also presented to explain such phenomenon. This study presents the first discussion on textile induced EBG and suggests further development on textile based metamaterials.