| Abstract: | In this article, a triple‐band metamaterial low‐profile absorber with polarization independence is proposed. The proposed metamaterial unit cell is composed of two modified rings with square patch at corners. In addition, the proposed absorber is consists of 10 × 10 periodic unit cells with size of 100 mm × 100 mm. To explain the mechanism, the electric field, the surface current distribution, and equivalent circuit model are present. The structure exhibiting three absorption peaks of 99.01%, 97.18%, and 99.53% under normal incidence at 8.92‐9.11 GHz, 13.78‐14.05 GHz and 14.92‐15.21 GHz which cover X and Ku‐band, respectively. In addition, the proposed structure is insensitive for the transverse magnetic/transverse electric field polarization of incident waves and also the angle of incidence. Furthermore, the three operating bands of the absorber can be adjusted independently and offers low profile which makes the design suitable for different curved surface applications. The proposed structure is fabricated and experiments are carried out to validate the design principle. Good agreements are observed between the measured and the corresponding simulated results. |
