scholarly journals Oblique Wide-Angle Multi-Sector Metamaterial Absorber for Space Applications

2019 ◽  
Vol 9 (16) ◽  
pp. 3425 ◽  
Author(s):  
Olivier Rance ◽  
Anne Claire Lepage ◽  
Xavier Begaud ◽  
Kevin Elis ◽  
Nicolas Capet
Keyword(s):  
Reflection Coefficient ◽  
Frequency Band ◽  
Oblique Incidence ◽  
Metamaterial Absorber ◽  
Wide Angle ◽  
Space Applications ◽  
Specific Measurement ◽  
Measurement Results ◽  
Absorbing Material

This article presents the design, realization and measurement of lightweight absorbing material for space applications. The electromagnetic absorber, operating on the [2 GHz, 2.3 GHz] frequency band, is designed for oblique incidence ranging from 35° to 65°. Wide-angle designs are demonstrated to be particularly challenging at oblique incidence and an approach consisting in dividing the surface in two different sectors with respect to the incoming angle is proposed. A specific measurement setup is presented in order to characterize this new kind of evolutive absorber. The measurement results show that the sectorial absorber achieves a reflection coefficient inferior to −11.5 dB, corresponding to an absorptivity above 0.965 on the frequency band [2 GHz, 2.3 GHz] for both TE and TM polarizations for angles of incidence varying from 35° to 65°.

Radar Absorbing Materials Based on Metamaterials

2010 ◽  
Vol 75 ◽  
pp. 215-223
Author(s):  
Andrey Nikolayevich Lagarkov ◽  
Vladimir Nikolayevich Kisel ◽  
Vladimir Nikolayevich Semenenko
Keyword(s):  
Electromagnetic Wave ◽  
Reflection Coefficient ◽  
Frequency Band ◽  
Radar Absorbing Material ◽  
Wide Range ◽  
Absorbing Materials ◽  
Different Types ◽  
Absorbing Material ◽  
Wave Incidence

The use of metamaterial for design of radar absorbing material (RAM) is discussed. The typical features of the frequency dependencies of , , ,  of composites manufactured of different types of resonant inclusions are given as an example. The RAM characteristics obtained by the use of the composites are given. It is shown that it is possible to use for RAM design the metamaterials with both the positive values of ,  and negative ones. Making use of the frequency band with negative  and  it is possible to create a RAM with low reflection coefficient in a wide range of the angles of electromagnetic wave incidence.

scholarly journals A Wide-Angle, Enhanced Oblique Incidence, Bend-Able Metamaterial Absorber Employed in Visible Region With a Sun Shape Resonator

IEEE Access ◽  
2021 ◽  
Vol 9 ◽  
pp. 126466-126480
Author(s):  
Md Mizan Kabir Shuvo ◽  
Md Imran Hossain ◽  
Sydur Rahman ◽  
Sultan Mahmud ◽  
Sikder Sunbeam Islam ◽  
...  
Keyword(s):  
Oblique Incidence ◽  
Visible Region ◽  
Metamaterial Absorber ◽  
Wide Angle

scholarly journals Ultra-Wideband and Wide-Angle Microwave Metamaterial Absorber

Materials ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 2045 ◽  
Author(s):  
Xavier Begaud ◽  
Anne Lepage ◽  
Stefan Varault ◽  
Michel Soiron ◽  
André Barka
Keyword(s):  
Reflection Coefficient ◽  
Impedance Matching ◽  
Normal Incidence ◽  
Multilayered Structure ◽  
Metamaterial Absorber ◽  
Ultra Wideband ◽  
Wide Angle ◽  
Total Thickness ◽  
Dielectric Layers ◽  
Absorbing Materials

In order to extend the performance of radar absorbing materials, it is necessary to design new structures with wideband properties and large angles of incidence which are also as thin as possible. The objective of this work, realized within the framework of the SAFAS project (self-complementary surface with low signature) is, then, the development of an ultra-wideband microwave absorber of low thickness. The design of such material requires a multilayered structure composed with dielectric layers, metasurfaces, and wide-angle impedance matching layers. This solution has been realized with on-the-shelf materials, and measured to validate the concept. At normal incidence, the bandwidth ratio, defined for a magnitude of the reflection coefficient below −10 dB, is 4.7:1 for an absorber with a total thickness of 11.5 mm, which corresponds to λ/7 at the lowest operating frequency. For an incidence of 60°, this bandwidth ratio is reduced to 3.8:1, but the device remains ultra-wideband.

Single-peak-regulation and wide-angle dual-band metamaterial absorber based on hollow-cross and solid-cross resonators

2020 ◽  
Vol 91 (3) ◽  
pp. 30901
Author(s):  
Yibo Tang ◽  
Longhui He ◽  
Jianming Xu ◽  
Hailang He ◽  
Yuhan Li ◽  
...  
Keyword(s):  
Transverse Electric ◽  
Surface Current ◽  
Dielectric Substrate ◽  
Transverse Magnetic ◽  
Metamaterial Absorber ◽  
Absorption Peak ◽  
Dual Band ◽  
Single Peak ◽  
Wide Angle ◽  
Surface Current Density

A dual-band microwave metamaterial absorber with single-peak regulation and wide-angle absorption has been proposed and illustrated. The designed metamaterial absorber is consisted of hollow-cross resonators, solid-cross resonators, dielectric substrate and metallic background plane. Strong absorption peak coefficients of 99.92% and 99.55% are achieved at 8.42 and 11.31 GHz, respectively, which is basically consistent with the experimental results. Surface current density and changing material properties are employed to illustrate the absorptive mechanism. More importantly, the proposed dual-band metamaterial absorber has the adjustable property of single absorption peak and could operate well at wide incidence angles for both transverse electric (TE) and transverse magnetic (TM) waves. Research results could provide and enrich instructive guidances for realizing a single-peak-regulation and wide-angle dual-band metamaterial absorber.

scholarly journals Broadband Solar Absorber Based on Square Ring cross Arrays of ZnS

Micromachines ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 909
Author(s):  
Feng Xu ◽  
Lixia Lin ◽  
Jun Fang ◽  
Mianli Huang ◽  
Feng Wang ◽  
...  
Keyword(s):  
Absorption Spectrum ◽  
Visible Light ◽  
Surface Plasmon ◽  
Wide Spectrum ◽  
Clean Energy ◽  
Metamaterial Absorber ◽  
Absorption Efficiency ◽  
Plasmon Mode ◽  
Solar Absorber ◽  
Absorbing Material

Solar energy is an inexhaustible clean energy. However, how to improve the absorption efficiency in the visible band is a long-term problem for researchers. Therefore, an electromagnetic wave absorber with an ultra-long absorption spectrum has been widely considered by researchers of optoelectronic materials. A kind of absorbing material based on ZnS material is presented in this paper. Our purpose is for the absorber to achieve a good and wide spectrum of visible light absorption performance. In the wide spectrum band (553.0 THz–793.0 THz) of the absorption spectrum, the average absorption rate of the absorber is above 94%. Using surface plasmon resonance (SPR) and gap surface plasmon mode, the metamaterial absorber was studied in visible light. In particular, the absorber is insensitive to both electric and magnetic absorption. The absorber can operate in complex electromagnetic environments and at high temperatures. This is because the absorber is made of refractory metals. Finally, we discuss and analyze the influence of the parameters regulating the absorber on the absorber absorption efficiency. We have tried to explain why the absorber can produce wideband absorption.

scholarly journals Theoretical design of a triple-band perfect metamaterial absorber based on graphene with wide-angle insensitivity

2021 ◽  
Vol 23 ◽  
pp. 104037
Author(s):  
Miao Pan ◽  
Huazhu Huang ◽  
Baodian Fan ◽  
Wenzhi Chen ◽  
Shuai Li ◽  
...  
Keyword(s):  
Metamaterial Absorber ◽  
Wide Angle ◽  
Theoretical Design ◽  
Perfect Metamaterial Absorber ◽  
Triple Band
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