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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.
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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.
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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, feeding…
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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.
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A FAFFA-MLFMA algorithm for electromagnetic scattering
Based on the multilevel fast multipole algorithm (MLFMA), an efficient method is proposed to accelerate the solution of the combined field integral equation in electromagnetic scattering and…
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Magnetic field integral equation at very low frequencies
It is known that there is a low-frequency breakdown problem when the method of moments (MOM) with Rao-Wilton-Glisson (RWG) basis is used in the electric field integral equation (EFIE); it can be…
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An Optimizable Circuit Structure for High-Efficiency Wireless Power Transfer
TLDR
A simple circuit topological structure, the series-shunt mixed-resonant coupling, is presented with better performance in the transfer distance and efficiency and has another advantage that circuit parameters can be easily optimized for high transfer efficiency under different distances.
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Ultrawideband and High-Efficiency Linear Polarization Converter Based on Double V-Shaped Metasurface
In this paper, a double V-shaped metasurface that can efficiently convert linear polarizations of electromagnetic (EM) waves in wideband is proposed. Based on the electric and magnetic resonant…
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Conformal surface plasmons propagating on ultrathin and flexible films
TLDR
Con conformal surface plasmons (CSPs), surface plasmon waves that can propagate on ultrathin and flexible films to long distances in a wide broadband range from microwave to mid-infrared frequencies are proposed.
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Metamaterials: Theory, Design, and Applications
Metamaterials:Theory, Design, and Applications goes beyond left-handed materials (LHM) or negative index materials (NIM) and focuses on recent research activity. Included here is an introduction to…
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