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A new design of reflective phase-shifting surface for generating an orbital angular momentum (OAM) vortex wave in the radio frequency domain is presented in this paper. The reflective phase-shifting surface consists of single-layer square patches periodically arranged. Theoretical formulations of phase-shift distributions are deduced and used to design the reflective phase-shifting surface producing...
Split-ring resonators (SRRs) and continuous metallic wires were used to realize double negative materials (DNGs). In this paper, we discuss two kinds of DNG structures with different periodic arrangement. One is the conventional model with air separation, and the other is the solid-state structure. Full-wave simulations are used to analyze the effective medium characteristics and the figure of merit...
Orbital Angular Momentum (OAM) has drawn great attention of worldwide academia in the recent years. It has been intensively applied in the domains of optics. Recent studies imply that OAM vortex wave can be used in radio not only limited to optics. Then, the application of OAM in radio has gradually become a research hotspot, and developing effective antennas to produce OAM beams is one of the key...
In this paper, a reflectarray is designed to generate an orbital angular momentum (OAM) vortex wave at 0.1THz. The elements of circular patch with different radii are introduced to design the reflectarray producing an OAM wave. The simulation results implied that the OAM wave can be effectively generated by reflectarrays in THz band. The proposed method may provide a new way to generate the OAM vortex...
A near-field focused planar reflectarray for spatial power combining and wireless power transmission is presented in this paper. The design procedure is proposed for near-field focused reflectarray with two feeds. The reflection phase characteristics of the proposed tri-dipole element is analyzed, which can be effectively used to design the near-field focused reflectarray working at 2.45 GHz. Numerical...
This paper analyzes the effects of coaxial cables in the magnetic resonant wireless power transfer (WPT) system. The experimental results show that the transfer efficiency of WPT system would change when different coaxial cables were connected to the source and load coils. Some special phenomena are revealed and a possible interpretation is proposed in this paper. Experiment results show that the...
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