Fan Grill Shaped Circular Split-ring Loaded Metamaterial Absorber For X, Ku & K Band Applications

This paper presents a Fan grill-shaped circular split-ring loaded MM absorber for X, Ku & K band applications. The unit cell is a single negative (SNG) absorber with an FR4 substrate and a subwavelength size of $0.26 \lambda \times 0.26 \lambda$. This complex design absorber is incident angle insensitive in both normal and oblique polarization angles in transverse electromagnetic mode (TEM). The absorber exhibits five resonance frequencies with an absorption rate ranging from 92.77% to 99.98%. Due to its superior absorption qualities and clear construction compared with recent work on MM, this absorber has a special function in Stealth technology, Radar applications, and Satellite communications.