Abstract: Examples disclosed herein relate to a reflectarray antenna for enhanced wireless communication coverage area. A reflectarray antenna for enhanced wireless communication applications includes an array of reflectarray cells that includes a first plurality of conductive elements configured to radiate reflected radio frequency (RF) beams with a first phase shift in a first linear polarization and a second plurality of conductive elements arranged orthogonally to the first plurality of conductive elements and configured to radiate reflected RF beams with a second phase shift that is substantially equivalent to that of the first phase shift in a second linear polarization that is orthogonal to the first linear polarization. Other examples disclosed herein relate to a method of designing a reflectarray antenna and a method of performing pattern synthesis of a reflectarray antenna.

Abstract: A multiband resonator element which, on the one hand, compensates the components of an electromagnetic field radiated from its phase centre, located on the axis of symmetry of the resonator, to control the polarization purity of a radiating element. On the other hand, it enables the selection of the electromagnetic fields reflected and transmitted on a frequency- and multiband-selective surface. In this sense, this is an innovative element that enables the design of directive radiating elements and with an axial ratio for its circular polarization less than or equal to 1.5 dB for all the angles belonging to the hemisphere centred on broadside. Thus, it can be used in the design of reflectarrays, transmitarrays and any dichroic multiband surface, likewise on metamaterial surfaces.