A quad-band polarization independent metamaterial absorber

A quad-band polarization independent metamaterial absorber have been presented and discussed in this paper. The proposed unit cell structure consists of meander line type structure surrounded by a square ring printed on FR4 substrate backed by copper ground. The proposed structure displays three diverse absorption peaks 3.2 GHz, 6.25 GHz, 8.23 GHz and 9.60 GHz with absorpties of 97.7%, 97.6%, 93.1% and 99.6% respectively. It is symmetrical in nature and makes the structure polarization independent. Surface current have been analyzed to visualize the absorption at different absorption peaks of the proposed unit.