A Miniaturized Broadband Dual-Polarized Antenna

A miniaturized broadband dual-polarized antenna with high isolation and symmetric patterns is designed in this paper. The above antenna consists of two quadrature dipoles, a dielectric post, two coaxial lines, two short pins, and a metal reflector. The proposed antenna comes from the deformation of the metal loop dipole, which has the characteristics of broadband and miniaturization. The adoption of short pins makes the radiation patterns symmetrical and improves the isolation of feed ports, which facilitates the integration of the base station antenna array. The simulations show that the feed port isolation of the proposed antenna is below -30 dB and the length of each dipole is reduced by about 20%. Such an antenna structure facilitates the reduction of coupling between antenna elements and reduces the size of the array.