Single-layer Wideband Circuit Analog Absorber Combined Polarization Conversion

In this paper, a dual-band single-layer circuit analog (CA) absorber combined the absorption with other mechanisms is described. The design introduces the polarization-conversion (PC) into the resistor-loaded cross-dipole arrays. First, a single-layer wideband CA absorber with a metal backplate is designed. The inverted U as a polarization convertor is then used and optimized to improve the absorption bandwidth. It is shown through simulation and measurement that the proposed structure covers a dual band of 2.28 – 8.91 GHz and 13.65 – 18 GHz below −10 dB. It is worth mentioning that the structure can be used to diffuse the electromagnetic wave by rotating and combining the PC absorber.