A miniaturized low-frequency polarization-insensitive metamaterial absorber based on broadside-coupled spiral structures | Zendy

Lu Lei | Zendy; Qu Shao-Bo | Zendy; Hongyu Shi | Zendy; Anxue Zhang | Zendy; Zhang Jie-Que | Zendy; Hua Ma | Zendy

Open Access

A miniaturized low-frequency polarization-insensitive metamaterial absorber based on broadside-coupled spiral structures

Author(s) -

Lu Lei,

Qu Shao-Bo,

Hongyu Shi,

Anxue Zhang,

Zhang Jie-Que,

Hua Ma

Publication year - 2013

Publication title -

acta physica sinica

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.

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