Influence of the dielectric-spacer thickness on the dual-band metamaterial absorber

Li, Minhua; Liu, Shouyin; Guo, Linyan; Lin, Hai; Yang, Helin; Xiao, Bing

doi:10.1016/j.optcom.2013.01.030

Cited by 30 publications

(14 citation statements)

References 18 publications

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“…With increasing w, C will decrease, finally resulting in the increase of magnetic resonance frequency. This indicates that the frequency ranges of polarization conversion can be tuned by changing the width of the complementary cross-wire [38].…”

Section: Design Simulation and Experimentsmentioning

confidence: 98%

Ultra-broadband 90° polarization rotator based on bi-anisotropic metamaterial

Huang

Xiao

Yang

et al. 2015

Optics Communications

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Section: Design Simulation and Experimentsmentioning

confidence: 98%

Ultra-broadband 90° polarization rotator based on bi-anisotropic metamaterial

Huang

Xiao

Yang

et al. 2015

Optics Communications

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“…Metamaterials are the artificial subwavelength composite electromagnetic materials composed of periodic arrays of metallic structures and dielectric spacer . MMs are capable to attain the extraordinary EM properties such as negative permittivity, negative permeability, negative refractive index, electric and magnetic response to electromagnetic radiations, etc .…”

Section: Introductionmentioning

confidence: 99%

Triple band ultrathin polarization insensitive metamaterial absorber for defense, explosive detection and airborne radar applications

Dhillon

Mittal

Bargota

2018

Micro & Optical Tech Letters

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We demonstrate an ultrathin polarization insensitive metamaterial‐based Concentric Closed Circular Ring Resonator (CCCRR) perfect absorber for explosive detection, bolometer, indoor radar clear applications, thermal detection, defense applications, airborne and surveillance radar signal absorption applications. The unit cell incorporates three concentric closed circular ring resonators. A parametric optimization has been carried out in order to obtain three discrete absorption peaks at 5.57 GHz, 7.969 GHz, and 13.44 GHz exhibiting absorption intensities of 98.87%, 97.99%, and 99.28%, respectively. Owing to the geometrical symmetry, the structure is polarization insensitive for both TE and TM polarizations and has significant absorbance over a wide angle of incidence of 45° for TE and 75° for TM polarizations. The structure is very compact with physical dimensions of 0.185λo*0.185λo *0.01λo, λo is wavelength corresponding to lower absorption peak. The thickness of the proposed structure is λo/100, evidencing the ultrathin characteristic of the proposed structure. The insight of absorption mechanism has been illustrated by analyzing the electric field distribution, power loss density, and normalized impedance. An extensive parametric analysis has been exercised to examine the influence of parametric alterations.

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“…These advantages have led to the rapid growth of metamaterial absorbers in microwave and terahertz [16][17][18] frequency regimes too. Various metamaterial absorbers with different characteristics, such as single band [19,20], dual band [21][22][23][24][25][26][27][28][29], triple band [30][31][32][33][34], quad band [35], penta-band [36] and wide band absorption, have been developed and studied.…”

Section: Introductionmentioning

confidence: 99%

“…Tuong et al [24] demonstrated a dual-band structure at 8.55 GHz and 11.78 GHz with measured absorptivity of 96% and 98% at lower and higher frequencies, respectively. Li et al [25] varied the dielectric spacer and obtained absorption of 99.3% and 99.4%. Zhai et al [26] used Jerusalem resonators for designing a dual-band MMA which operates at 5.95 GHz and 12.25 GHz with absorption above 90%.…”

Section: Introductionmentioning

confidence: 99%

Design of Polarization-Insensitive Dual Band Metamaterial Absorber

Ramya¹,

Rao²

2016

PIER M

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Abstract-A new design has been proposed for a single layer polarization-insensitive dual-band metamaterial absorber at C and X bands. The proposed structure consists of a periodic arrangement of a circular resonator embedded in a square resonator. A commercially available FR4 dielectric has been used as a substrate with metallic grounded bottom and imprints on the other side. This structure resonates at 5.5 GHz and 8.9 GHz with absorptivity of 99.8% and 99.97%, respectively. It exhibits polarization-insensitive behaviour for Transverse Electric and Transverse Magnetic polarization under oblique and normal angles of incidence. The field distributions have been studied for better understanding of the absorption mechanism. The fabricated structure has been tested, and the experimental results are similar to the simulated ones. This polarization-insensitive metamaterial absorber with its ease of design and nearly unity absorption can be used for radar applications.

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Influence of the dielectric-spacer thickness on the dual-band metamaterial absorber

Cited by 30 publications

References 18 publications

Ultra-broadband 90° polarization rotator based on bi-anisotropic metamaterial

Ultra-broadband 90° polarization rotator based on bi-anisotropic metamaterial

Triple band ultrathin polarization insensitive metamaterial absorber for defense, explosive detection and airborne radar applications

Design of Polarization-Insensitive Dual Band Metamaterial Absorber

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