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Water occurring on earth has always been equipped with the characteristic of frequency dispersive permittivity at microwave frequency, which thus can be seen as a promising constituent material for broadband electromagnetic wave absorption. Here, we develop water as ultrathin dielectric substrate standing on the metal backplane to construct three-dimensional grid array, which can acquire broadband...
We demonstrated that the three-dimensional metamaterial absorbers, consisting of the resistive patches and metallic backboard, can exhibit ultra-broadband and highly efficient absorption for a certain larger incidence of the transverse magnetic wave. The three-dimensional unit cell is constructed by bending the resistive patches, which is arranged at a certain period on the metal plate. Comparing...
In this paper, we propose a polarization-independent and broadband perfect metamaterial absorber operating in mid-infrared region. The proposed absorber is a periodic meta-atom array consisting of metal-dielectric-multilayer truncated cones, which can control gray- or black-body thermal signatures. The simulation is implemented using CST Microwave Studio. The simulated results show that the proposed...
Ultra-broadband absorption has always been the pursuit of the goal in the field of metamaterial absorbers(MAs). While the only requirement for the absorption bandwidth is not integrated. In this paper, we demonstrate that the directional selectivity with high-effective and broadband absorption of transverse magnetic(TM) wave can be designed by introducing a three-dimensional(3D) structure into the...
The application of the traditional magnetic materials in absorbing always have shortcomings of big quality and low efficiency at low frequency. On this regard, a new microwave absorber is proposed by combining the magnetic materials with the phase gradient metasurface. As an example, a composite absorber is designed by a composition of the magnetic material ECCOSORB SFU-5.5 and a phase gradient metasurface...
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