Open AccessTransparent ultrawideband absorber based on simple patterned resistive metasurface with three resonant modes
Author(s) -
Pingping Min,
Zi Song,
Lei Yang,
Bing Dai,
Jiaqi Zhu
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.396812
Subject(s) - optics , materials science , resistive touchscreen , ground plane , wideband , metamaterial , metamaterial absorber , wavelength , absorptance , microwave , bandwidth (computing) , polarization (electrochemistry) , transmittance , optoelectronics , physics , reflectivity , tunable metamaterials , antenna (radio) , telecommunications , chemistry , quantum mechanics , computer science , electrical engineering , engineering
A transparent low-profile polarization-insensitive metamaterial absorber with ultrawideband microwave absorption is presented. A fractional bandwidth of 125.2% (4.3-18.7 GHz, absorptance > 90%) is achieved using a simple patterned resistive metasurface. The thickness of the absorber is only ∼0.086 times the upper-cutoff wavelength. The experimental results agree with full-wave simulation results. A Cu-metal-mesh ground plane enhances the shielding efficiency and visible transparency. Radar cross-sections (RCS) are reduced across all reflection angles, over frequencies spanning the C, X, and K u bands. With its visible-wavelength transparency, low profile, polarization insensitivity, excellent absorption, and wideband RCS reduction, the proposed absorber has wide applicability.