Experimental studies of absorption bandwidth enhancement in random metamaterials

This work presents experimental results of scattering studies in spatially random metamaterial absorbers fabricated by randomly distributed conducting circular patches on a dielectric substrate having a conducting ground plane. It has been showed that due to the random distributions of distances between the resonators, there are many coupled resonances, resonating at different wavelengths, resulting in a wider absorption bandwidth. For the validation of experimental results, numerical simulations were carried out and a good degree of agreement was found between them.