Design of a dual band transparent metamaterial absorber

In this paper, a transparent metamaterial (MTM) absorber in dual band application is proposed. The absorber is designed using on indium tin oxide (ITO) film for transparency. The unit cell of the proposed absorber consists of an electric LC (ELC) resonator and a ground plate, which are printed on opposite sides of the glass substrate. The ELC resonator comprises two symmetric triangular split ring resonators (TSRRs) for 8 GHz band and another two symmetric TSRRs for 12 GHz band. In low band, the absorber exhibits an absorption of 98.6 % and a full width at half maximum (FWHM) of 6.3 % at 8 GHz. In high band, the absorber exhibits an absorption of 98.2 % and a FWHM of 7.6 % at 12 GHz.