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Design of Polarization-Insensitive Dual Band Metamaterial Absorber
Progress In Electromagnetics Research M, Vol. 50, 23-31, 2016
A new design has been proposed for a single layer polarization-insensitive dual-band metamaterial absorber at C and X bands. The proposed structure consists of a periodic arrangement of a circular resonator embedded in a square resonator. A commercially available FR4 dielectric has been used as a substrate with metallic grounded bottom and imprints on the other side. This structure resonates at 5.5 GHz and 8.9 GHz with absorptivity of 99.8% and 99.97%, respectively. It exhibits polarization-insensitive behaviour for Transverse Electric and Transverse Magnetic polarization under oblique and normal angles of incidence. The field distributions have been studied for better understanding of the absorption mechanism. The fabricated structure has been tested, and the experimental results are similar to the simulated ones. This polarization-insensitive metamaterial absorber with its ease of design and nearly unity absorption can be used for radar applications.
Sekar Ramya, and Inabathini Srinivasa Rao, "Design of Polarization-Insensitive Dual Band Metamaterial Absorber," Progress In Electromagnetics Research M, Vol. 50, 23-31, 2016.

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