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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...
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 describes the performance of a multi-band antenna with a Partially Reflective Surface (PRS) printed underneath the substrate to reduce the level of Specific Absorption Rate (SAR). The frequency band considered ranges from 850 MHz to 977 MHz and from 1.7 GHz to 2.1 GHz. The multi-band antenna placed above an FR4 substrate with the PRS printed below was found to reduce the 1-g average SAR...
A Ka-band reflectarray consists of modified cross loop is investigated in this paper. The reflectarray consists of 30 × 30 unit cells and covering an area of 15cm × 15 cm. The unit cell is composed of a solid cross inside and a cross loop outside. Varying the lengths of the cross can lead to nearly 550o linear phase shift curve. Using this technique, a single layer reflectarray that has a wider bandwidth...
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