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Coding metamaterials, digital metamaterials and programmable metamaterials
TLDR
Digital metamaterials consisting of two kinds of unit cells whose different phase responses allow them to act as ‘0’ and ‘1’ bits are developed to enable controlled manipulation of electromagnetic waves. Expand
Wireless Communications With Reconfigurable Intelligent Surface: Path Loss Modeling and Experimental Measurement
TLDR
The proposed models, which are first validated through extensive simulation results, reveal the relationships between the free-space path loss of RIS-assisted wireless communications and the distances from the transmitter/receiver to the RIS, the size of the ris, the near-field/far-field effects of the RIS and the radiation patterns of antennas and unit cells. Expand
Broadband and high-efficiency conversion from guided waves to spoof surface plasmon polaritons
The conversion from spatial propagating waves to surface plasmon polaritons (SPPs) has been well studied, and shown to be very efficient by using gradient-index metasurfaces. However, feedingExpand
Space-time-coding digital metasurfaces
TLDR
A general theory of space-time modulated digital coding metasurfaces is proposed to obtain simultaneous manipulations of EM waves in both space and frequency domains, i.e., to control the propagation direction and harmonic power distribution simultaneously. Expand
Frequency-Controls of Electromagnetic Multi-Beam Scanning by Metasurfaces
TLDR
This is the first time to realize 2D scans of antennas by changing the frequency, and a combined theory of holography and leaky wave is presented to realize the multi-beam radiations by exciting the surface interference patterns, which are generated by interference between the excitation source and required radiation waves. Expand
Wireless communications with programmable metasurface: Transceiver design and experimental results
TLDR
The fundamental principle of applying programmable metasurface as transmitter for wireless communications is presented and a prototype system of meta-surface-based transmitter is established to conduct several experiments and measurements over the air, which practically demonstrate the feasibility of using programmable meetasurfaces in future communication systems. Expand
Ultrathin multiband gigahertz metamaterial absorbers
We propose ultrathin multiband metamaterial absorbers in the microwave frequencies in which the design, analysis, fabrication, and measurement of the absorbers working in multiple bands areExpand
Experimental demonstration of electromagnetic tunneling through an epsilon-near-zero metamaterial at microwave frequencies.
TLDR
An experimental demonstration of microwave tunneling between two planar waveguides separated by a thin ENZ channel is presented, in agreement with theory and numerical simulations. Expand
Negative refractions in uniaxially anisotropic chiral media
Uniaxially anisotropic chiral media are quite easy to be realized artificially, where the chirality appears only in one direction. In this report, we investigate the refractive properties of a planeExpand
Programmable metasurface‐based RF chain‐free 8PSK wireless transmitter
TLDR
The authors demonstrate that a programmable metasurface-based 8-phase shift-keying (8PSK) transmitter with 8 × 32 phase adjustable unit cells can achieve 6.144 Mbps data rate over the air at 4.25 GHz with a comparable bit error rate performance as the conventional approach without channel coding, but with less hardware complexity. Expand
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