A near zero refractive index metalens to focus electromagnetic waves with phase compensation metasurface

Metamaterials have been widely used to enhance radiation characteristics of antennas thanks to their ability to manipulate the electromagnetic waves. Recent progress has shown that flat metasurfaces with reduced tunable dimensions are capable to provide a near zero refractive index and a phase compensation mechanism which are responsible for the focusing of electromagnetic waves. Here, we present a study, about two types of flat metasurface lenses operating at the frequency of 5.9 GHz for the improvement of a patch antenna radiation properties and bandwidth at the same time. The proposed structures can be used in wireless point to point communication and especially for WAVE applications.