Saptarshi Ghosh, Somak Bhattacharyya, K. V. Srivastava
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Design of ultra-thin polarization-insensitive circular-shaped microwave metamaterial absorber
An ultra-thin polarization-insensitive circular-shaped metamaterial based absorber has been presented based on Electric field driven LC (ELC) resonance. The basic unit cell consists of a metallic ELC resonator imprinted on FR-4 dielectric substrate backed by copper ground, which gives rise to high (99.85%) absorption at 11.07 GHz. The proposed structure is symmetric by design and thus exhibits high absorption for any angle of polarization. It also shows high absorption (80%) for incident angle upto 50° for both TE and TM polarizations. The absorption due to LC resonance of the proposed structure has been analyzed by varying different geometric parameters.
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