Circularly polarized 2x2 array antenna with matching network for LTE applications

Abstract

A model of circularly polarized 2 X 2 array structure antenna is designed to operate at 2.34 GHz band LTE applications. Designed antenna is incorporated with inset fed of 50-ohm impedance proper matching network. The total area of the antenna is around 13.5X13.7 cm on FR4 substrate material with dielectric constant of 4.4. The proposed antenna is providing left hand circular polarization gain of 11.1 dB and right-hand circular polarization of gain 11.9 dB with total gain of 14.34 dB. The axial ratio is less than 3 dB and the S11 are less than-10 dB at the operating frequency band. Designed antenna will be well suited for LTE i.e. 4G communication applications with good radiation characteristics.