The mutual coupling between antenna elements affects the antenna parameters like
terminal impedances, reflection coefficients and hence the antenna array performance in …

Various methods have been proposed to control the electromagnetic fields in the near-or far-
field region, one of which is to use antenna arrays. This paper reviews a technique, called …

Reconfigurable Intelligent Surfaces (RISs) comprised of tunable unit elements have been
recently considered in indoor communication environments for focusing signal reflections to …

Focusing the electromagnetic field radiated by an antenna at a point in the antenna near-
field (NF) region is a wellknown technique to increase the electromagnetic power density in …

A detailed performance analysis of near-field-focused planar arrays is addressed. Design
curves and performance data are shown for planar square arrays as a function of the array …

We propose a novel design of a near-field transmitting focused metasurface, which
transforms a linearly polarized planar incident wave into a near-field focused beam with …

Some focusing properties of Fresnel zone plate (FZP) lens antennas in the near-field region
are presented at the ka-band. Simulated and measured results of the FZP antenna show …

In this paper, we propose an optimal design procedure for the focused antenna array based
on the maximization of power transmission efficiency between two antennas. In the …

A high-gain, linear polarized microstrip antenna array for energy harvesting at 915 MHz is
studied in this letter. The optimization theory for wireless power transmission efficiency has …

An effective method based on Bayesian compressive sensing (BCS) and convex
optimization for near-field sparse array synthesis is presented in this paper. An algorithm to …