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Design and Analysis of a Polarization‐Insensitive and Wide‐Angle Ultrabroadband Metamaterial Absorber
Author(s) -
Luo Zhiyou,
Ji Shijun,
Zhao Ji,
Wu Han,
Dai Handa
Publication year - 2021
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.202100111
Subject(s) - optics , molar absorptivity , polarization (electrochemistry) , frustum , metamaterial absorber , electric field , transverse plane , electromagnetic shielding , materials science , metamaterial , broadband , absorption (acoustics) , brewster's angle , physics , tunable metamaterials , chemistry , geometry , mathematics , structural engineering , quantum mechanics , composite material , engineering , brewster
Herein, a polarization‐insensitive and wide‐angle characteristic ultrabroadband metamaterial absorber (UBMMA) is reported, which covers the entire X band and Ku band and parts of the C band and K band. The standard unit cell of the UBMMA is designed based on the frustum of a cone with a through‐hole, and it is composed of multiple metal and dielectric layers by cross. The calculation results indicate that the absorptivity of the proposed UBMMA is more than 85% from 6.65 to 23.73 GHz except for the frequency bands 13.10–13.20 and 15.38–15.73 GHz, and the absorptivity is more than 90% in the frequency bands 6.65–12.25 and 20.33–23.33 GHz. The distributions of the electric field, magnetic field, and surface current are calculated and analyzed, and the absorbing mechanism of the UBMMA is explained. The UBMMA is insensitive to the transverse electric and transverse magnetic polarization, and it displays an agreeable absorption effect under high incident angles. The influence of important geometric parameters on the absorption performance of the UBMMA is studied. Because of the satisfactory ultrabroadband absorption performance of the UBMMA, it can be applied in the fields of satellite radar, broadband antennae, and electromagnetic shielding.