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In this work, a typical two-dimensional (2D) material WS2 on a dielectric substrate is measured by terahertz time-domain spectroscopy (THz-TDS) and analyzed using the Drude conductivity model. The transmittance and sheet conductivity of monolayer WS2 have been obtained. This technology can be used to measure the thin film 2D materials in THz frequency regions.
In this work, a typical two-dimensional (2D) material MoS2 on a dielectric substrate is measured by terahertz time-domain spectroscopy (THz-TDS) and analyzed using the Drude model. The transmittance and sheet conductivity of monolayer MoS2 have been obtained. This technology can be used to measure the thin film 2D materials in THz frequency regions.
In this letter, we proposed a new method to reduce mutual coupling of antenna array without adding additional space for the added structures, such as modified ground structure, metamaterial, and parasitic elements on the surface of antenna substrate. As an example, a compact two-element antenna array working at 5 GHz is designed. Two closed chip loop structures (CCLSs) around the two radiation patches...
In this paper, we propose the design of in-plane focus reflector antennas (IFRA) based on phase gradient metasurface (PGM). The in-plane focus is achieved by using PGM with large in-plane phase gradient, which can couple normally incident waves efficiently into surface waves along the surface. This is different from conventional reflector antennas and reflectarray antennas, where the focus lies above...
In this letter, we propose the decoupling technique of patch antenna arrays by suppressing near-field magnetic coupling (NFMC) using magnetic metamaterials unite cells. To this end, a highly-integrated linked magnetic metamaterial unite cells, the substrate-integrated split-ring resonator (SI-SRR), is firstly proposed to achieve negative permeability at the antenna operating frequency. By integrating...
In this paper, a miniaturized frequency selective surface (FSS) composed of convoluted element of dipoles is proposed. The FSS is printed on one face of a single-layer substrate with a relative permittivity of 2.65. The novel FSS has promising miniaturization characteristics with the unit cell dimension 0.042λ×0.042λ, where λ represents the free-space wavelength corresponding to the resonant frequency...
In this paper, we present a novel miniaturized microstrip patch antenna based on metamaterial unit. This antenna works at 9.68 GHz and is linear polarized. The numerical results show that impedance bandwidth (S11<−10 dB) is about 122 MHz and the gain is 4.97 dB. Moreover, the patch size is a quarter of wavelength in medium.
A mechanically tunable planar left-handed metamaterial (LHM) using SRR pairs was presented. The two identical SRRs of a SRR pair unit cell are etched on two separate substrates so that the coupling between the two SRRs can be adjusted by slipping one SRR relative to the other. The tunable planar LHM was investigated. The results show that the tunable planar LHM can be tuned within a broad range continuously,...
In this letter, a novel bandpass frequency selective surface (FSS) with miniaturized periodic element is presented. The proposed FSS is printed on one face of a single-layer substrate with a relative permittivity of 2.65. The novel FSS has promising miniaturization characteristics with the unit-cell dimension , where represents the free-space wavelength corresponding...
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