Thickness Optimization of 5G Graphene-based Absorbing Textiles

A new method to design graphene based absorbing textiles is proposed. These textiles consist of graphene based coatings acting as lossy layers, of textiles acting as spacers and supported by metallic layers functioning as perfect electric conductors. Polyester fabrics are selected as textiles and coatings are made of polyvinylidene fluoride (PVDF) matrices filled with different amounts of graphene nanoplatelets (GNPs). The developed method is used to evaluate the ideal thicknesses of the graphene based coatings and of the textiles. The optimal thicknesses are calculated for frequencies of 25.8 GHz and 27.9 GHz to achieve a -10dB bandwidth that covers the 5G frequency bands between 23.8 and 40 GHz. The absorption performances of the resulting absorbing structures will be evaluated in the 5G high frequency range.