Superdirective Array Antennas with Pattern Radiation Reconfigurable for Wi-Fi box

Abstract

This paper presents a design of a superdirective array of 3 monopoles antennas with radiation pattern reconfigurable for Wi-Fi box in ISM band. It is principally based on Uzkov's theory, who define the possibility to obtain a high directivity in order of N2 in a desired direction by linearly associating a large number of N radiators closely spaced. Since we calculated specific currents excitation in magnitude and phase to obtain a superdirectivity reconfigurable for desired direction, we design this array antennas by exciting one monopole by a unit current and loaded the others two by impedances Znload determined from uzkov's theory. This impedances are each other directly connected to its pin diode which allow to swicth in a desired direction without any mutual coupling between monopoles and cover all 360 deg of azimutal plane. This array antennas, efficient at 96%, presents approximately similar results in all 360 deg of azimtal plane with a reconfigurable directivity in order of 5.2dB and a Back lobe of −14dB with an Half Power Beam of around 120 deg in every direction.