Open AccessA miniaturized low-frequency polarization-insensitive metamaterial absorber based on broadside-coupled spiral structures
Author(s) -
Lei Lü,
Shaobo Qu,
Haiyang Shi,
Anxue Zhang,
Zhang Jie-Que,
Hongfang Ma
Publication year - 2013
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.62.158102
Subject(s) - metamaterial absorber , metamaterial , optics , polarization (electrochemistry) , materials science , broadside , transverse plane , electromagnetic radiation , wavelength , narrowband , physics , optoelectronics , tunable metamaterials , chemistry , structural engineering , engineering
In this paper, we present the design, simulation, and experimental demonstration of a miniaturized low-frequency metamaterial absorber based on the broadside-coupled spiral structures. The tested results indicate that the metamaterial absorber can achieve a miniaturized narrowband absorption with a peak absorption of 98% at 1.39 GHz. Both of the unit cell size and the total thickness of the metamaterial absorber are 6.8 mm that is approximately 1/32 of the working wavelength. Since the spiral structures of the metamaterial absorber are arranged in rotational symmetry, the absorber is polarization-insensitive to the normal incident electromagnetic wave. Additionally, the metamaterial absorber can strongly absorb the obliquely incident electromagnetic wave for both transverse electric and transverse magnetic polarizations, even at 60° angle of incidence.