All-metal wide-angle and polarization-independent microwave metamaterial absorber

An innovative all-metal self-support microwave metamaterial absorber (MMA) based on a continuous complementary split ring resonator (CSRR) array frequency selective surface (FSS) is constructed. The CSRR-based FSS has a selected frequency of 23 GHz and is proved to be polarization insensitive. And the all-metal MMA has the same response frequency as the FSS, showing convenience in the geometrical scaling process. Additionally, in both transverse electric and transverse magnetic modes, the all-metal MMA shows stable response at oblique incidences with an incident angle as large as 50 degrees. Along with lightweight, easy fabrication and high cost-performance ratio, the new proposed all-metal FSS-based MMA has good potential to serve in many practical applications. An innovative all-metal self-support microwave metamaterial absorber (MMA) based on a continuous complementary split ring resonator array frequency selective surface (FSS) is constructed. The all-metal MMA can be controlled by the same response frequency as the FSS for better designing convenience. And the all-metal MMA shows stable response at oblique incidences with the incident angle as large as 50 degrees. image