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Metamaterial Absorber - Astrophysics Data System

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Last Updated: 22 May 2022

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Broadband perfect metamaterial absorber based on the gallium arsenide grating complex structure

We suggest a broadband metamaterial absorber consisting of a periodic gallium arsenide grating array standing on a tungsten film separated by ultra-thin GaAs spacer layer. The excited surface plasmons in combination with the cavity modes yielded the best absorption results in the broadband. Due to the multiple resonance coupling, this absorber can also be used to produce high short-circuit current density over 56 mA/cm2 and near-unity solar energy trapping.

Source link: https://ui.adsabs.harvard.edu/abs/2019ResPh..1502760L/abstract


Development and Optimization of Broadband Acoustic Metamaterial Absorber Based on Parallel–Connection Square Helmholtz Resonators

The consistency of the experimental results and simulation results establishes the possibility of the new optimization technique and effectiveness of the manufactured acoustic metamaterial absorber, as well as the desired sound absorption results for given conditions. The experimental findings show that parallel-connection squares at Helmholtz resonators can have a variable frequency spectrum for the low frequency noise control by parameter optimization, which is important to advertise its use in lowering the noise in the factory.

Source link: https://ui.adsabs.harvard.edu/abs/2022Mate...15.3417W/abstract


A Novel Meander Line Metamaterial Absorber Operating at 24 GHz and 28 GHz for the 5G Applications

A massive MIMO scheme is used by fifth generation communication systems to increase gain and spatial multiplexing in arrays of 16 to 128 antennas. The absorber is capable of symmetric meander lines connected by a transmission line and operates between 24 GHz and 28 GHz and is made up of symmetric meander lines connected by a transmission line. The number of required meander lines to design the absorber is delineated in an analytical framework that helps to determine the total number of required meander lines is determined. The analytical model is based on the total inductance provided by the meander line structure in an impedance-matched electronic circuit. The new absorber is based on resonance's principle of resonance and absorbs two 5G bands. Before experiments for both transverse electric and transverse magnetic polarizations, a complete angular stability analysis was carried out. The comparison of simulation and measured results indicates that such an absorber would be a good candidate for absorption of millimeter-wave array antennas, in which elements are embedded within compact 5G systems.

Source link: https://ui.adsabs.harvard.edu/abs/2022Senso..22.3764N/abstract


A double-band tunable perfect terahertz metamaterial absorber based on Dirac semimetals

The simulation results reveal that the absorber has two peaks of high absorption at 2. 02 THz and 2. 49 THz, with the corresponding absorption rate being more than 99%. With the change of the Fermi energy level from 55 meV to 85 percent, a dynamic change in absorption rate from 90 to 99% could be effectively managed. Because of its central symmetry, the MA unit cell's absorption property makes it polarization free for TE and TM polarizations.

Source link: https://ui.adsabs.harvard.edu/abs/2019ResPh..1502773Z/abstract


Simulated and experimental studies of a multi-band symmetric metamaterial absorber with polarization independence for radar applications

For radar applications, we present a simple new model for a multi-band metamaterial absorber. For the numerical analysis and absorption study, Computer Simulation Technology Studio Suite 2018 was used. Typical absorption characteristics of 100%, 99%, and 99%, respectively, were shown by simulation results. The absorption mechanism of the proposed MTMA is shown by the surface current and electric field distributions. The proposed structure has the ability to be used in C and X band frequency bands.

Source link: https://ui.adsabs.harvard.edu/abs/2022ChPhB..31e8401A/abstract


Broadband incident angle independent magnetic composite metamaterial absorber with C-band absorption

The FeSiAl p/epoxy resin composite's wave-absorbing capabilities have been greatly enhanced in comparison to the simple FR4 matrix composite, and the effective bandwidth has increased by 11. 4 times from 0. 32 GHz to 4. 29 GHz, with the absorber having a noticeable C-band absorption effect. The absorber with special structure configuration not only solves the issue of narrow absorption band of metamaterials, but also addresses the shortcoming of weak C-band absorption of magnetic material absorber.

Source link: https://ui.adsabs.harvard.edu/abs/2022OptLT.15308031Z/abstract


A Review on Metamaterial Absorbers: Microwave to Optical

Metamaterials are artificially produced materials with unique characteristics due to their geometrical structure. MMs are used in a variety of fields, including invisibility cloaking, fine lensing, optimal absorption, and sensing. The absorption of electromagnetic absorption by metamaterial absorbers is discussed in this review article. An MMA is a composite made up of many layers of metallic patterns separated by dielectric. An MMA is a composite made up of several layers of metallic patterns separated by dielectric.

Source link: https://ui.adsabs.harvard.edu/abs/2022FrP....10.3791A/abstract

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions