A multiband metamaterial absorber for GHz and THz simultaneously

Nowadays, more and more metamaterial absorbers (MMAs) are explored not only in the microwave band but also in terahertz band, but few studies concentrate on metamaterial absorbers which can work in cross-band, that to say, absorb gigahertz (GHz) and terahertz (THz) electromagnetic (EM) waves simultaneously. This paper proposed a design concept of MMA which can realize the absorption in GHz-band and THz-band simultaneously, and designed a cross-band metamaterial absorber (CMMA). The proposed CMMA can achieve three absorption peaks in GHz-band and two absorption peaks in THz-band. The characteristic of simultaneous absorption to GHz and THz waves render the CMMA widely used in multi-band electromagnetic stealth and electronic countermeasures, and the superposition design concept provides a novel idea for designing cross-band absorber