A broadband metamaterial absorber with flexible low infrared radiation

Abstract In this paper, based on split resonant ring (SRR) and NaCl solution (NS), a conformal and low thermal infrared radiation (LTIR) broadband metamaterial absorber (MA) with double SRRs and NS resonant cavity is proposed. Through simulation and measurement, it is proved that the proposed absorber has electromagnetic (EM) wave absorptivity of more than 90% under different polarization angles and different conformal conditions at 9.58–24.42 GHz. By introducing microfluidic channels, coupled electromagnetic thermal and coupled heat transfer simulations demonstrate that the design MA can maintain the thermal stability and LTIR characteristics under different power EM waves irradiation with low flow velocity (0.05 m s −1 ). Based on its good absorption performance and LTIR performance, it can be predicted that the proposed MA will have great application value in non-planar surface EM wave stealth and infrared stealth.