DESIGN OF BROADBAND AND POLARIZATION-INDEPENDENCE METAMATERIAL ABSORBER USING A CHIRAL STRUCTURE WITH CONDUCTIVE POLYMER
We present a simple approach to enhance the bandwidth and absorptivity of the metamaterial absorber (MA) in the GHz region. The proposed MA is designed and simulated by computer simulation technology (CST) Microwave Studio. The results indicate that the absorption of the MA strongly depends on the conductivity of the polymer. By using a chiral structure with the low conductive polymer of 700 S\m, the absorption bandwidth is expanded up to 12.9 GHz (relative bandwidth of 85.7%) with absorptivity over 80%. It exhibits polarization-independent absorption and can be applied to fabricate broadband MA.