Double Square Loop Single Layer Frequency Selective Surfaces (FSS) for Wideband Absorption

This research presents a planar rectangular microwave absorber with double square loops in relation to a frequency selective surface (FSS). The suggested absorber is extremely effective, small in size, and contributes to widespread absorption outside of the x-band. A single layer substrate (RT5880) with a single layer (FSS) featuring double square loops is used to design the suggested structure. The suggested design’s working absorption bandwidth ranges from 10.21-40.5GHz, or 30.32GHz.