Wideband dual-polarized printed dipole antenna with high isolation

Abstract

A wideband dual-polarized printed dipole antenna with high isolation is proposed in this paper. The proposed antenna is composed of a horizontal substrate, a horizontal ground plane and two vertical substrates. The two vertical substrates are mounted orthogonally between the horizontal substrate and the horizontal ground plane. Four triangular patches are printed on the bottom side of the upper horizontal substrate symmetrically. Moreover, four vertical rectangular patches, which have the same center of symmetry as the triangular patches, are connected to the triangular patches and ground plane, respectively. Each two of the four rectangular patches are printed on one side of each vertical substrate that an integrated balun printed on the other side. The proposed antenna achieves a port isolation higher than 39dB over 52% impendence bandwidth (VSWR<;1.5). The antenna is easy to be extended to arrays and can be used for base station antennas in the next generation IMT-Advanced communications.