Carbon nanotube based structure with high absorption in X-band

Multi-layer structures of single-walled carbon nanotubes mixtures with epoxy resin at different weight percentages are studied for maximizing the absorption of incident waves over X-Band. A short survey is also performed in 1-5 GHz. A plane wave from various elevation angles is illuminating the structure. Comparison with reference results shows satisfactory agreement. An optimization method is adopted for minimizing both the Reflection and Transmission Coefficient with respect to the optimum thickness of each layer for structures with and without perfect electric conducting substrates. A drastically increased absorption greater than 90% is achieved with the presence of carbon nanotubes even without the use of perfect electric conducting substrates. Total thickness is similar to structures with perfect electric conducting substrates promising thus innovative and interesting components for both electromagnetic compatibility and radar absorbing material applications.