A Novel Miniaturized Metamaterial Microwave Absorber with Quasi-full-angle Stability

A novel miniaturized metamaterial microwave absorber with quasi-full-angle stability is proposed in this paper, where the meander line and the strong coupling between the patches are applied to increase the angular stability and decrease the structure size. The results show that the absorption peaks are always maintained at 5.2 GHz for TE mode from 0° to 80°, and TM mode from 0° to 40°, while the absorption rate of more than 80% is maintained at 5.2 GHz for both TE and TM mode from 0° to 60°. The miniaturized structure is only 3 mm (about $0.06\lambda$) in size while only about $0.03\lambda$ in thickness. The proposed metamaterial microwave absorber can be widely applied to electromagnetic interference shielding especially in narrow space application.