A Novel Dual-polarized Antenna with High Isolation and Low Cross Polarization for Wireless Communication

Abstract—In this paper, a new design of a dual-polarized antenna with high isolation and low cross polarization is proposed. The main radiation structures comprise two pairs of petaloid patches, which are fed by coaxial lines. Behind the patches, a U-shaped ground is placed to improve the front-to-back ratio of the antenna. Stable and symmetric radiation patterns at slanted ±45◦ polarization have been obtained within the frequency band 1.71–2.17GHz. A return loss of −14 dB is achieved and measured isolation between the two input ports is over 31 dB. The 3 dB beamwidths of the two polarizations is stable (65◦) and the average gain of the proposed antenna is about 9 dBi across the whole frequency band.