Experimental studies of absorption bandwidth enhancement in random metamaterials
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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.
The authors are grateful to Dr. Somnath Ghosh (IIT Jodhpur) and Dr. Soumava Mukherjee (IIT Jodhpur) for valuable discussions. They also want to thank the staff and students of Microwave Measurement Lab (IIT Kanpur) for their support during the experimental measurements.
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