a novel metamaterial absorber design in microwave frequency

microwave absorbers are used in military applications to reduce the radar crosssection (rcs) of a conducting object and the electromagnetic interference among microwave components. one of approaches for the design of em absorber structures was based on the use of metamaterial. in this paper, the design of novel, broadband metamaterial absorbers that operate in the microwave frequency, is presented. furthermore, the new structures are polarization-independent, due to the symmetry of its unit cell. by exploiting the scalability property of metamaterials, the operational bandwidth of our design can be drastically improved by placing unit cells with properly scaled resonators adjacent to each other. furthermore, the absorption band of the design is effectively extended by simply stacking several such structural layers with different geometrical dimensions.