A broadband dual‐polarized antenna array with excellent impedance matching and stable radiation performance is proposed. The array comprises four folded‐dipole antenna elements. Two trapezoidal baluns are used to excite the folded‐dipole antenna to obtain good impedance matching and generate a ±45°‐polarized radiation pattern. To improve the impedance matching and achieve steady radiation performance, a square parasitic director is used and placed above the folded dipoles. The antenna element realizes a broad bandwidth of 76.9% (voltage standing wave ratio [VSWR] < 1.5 from 1.69 to 3.8 GHz) and high isolation of 28 dB. Then an antenna array comprised of four elements is designed. It is fed by two miniaturized 1‐to‐4 power divides. Several metal baffles are added between adjacent elements to reduce the mutual coupling. The array achieves a broad bandwidth of 78.4% (VSWR < 1.5 from 1.66 to 3.8 GHz), high isolation of 25 dB, stable half power beamwidth in the E‐plane within 65° ± 5°, and high gain within 12–15 dBi.

A broadband folded dipole antenna for dual‐polarized radiation is presented. It comprises two couples of folded dipoles and a planar reflector. To enhance the impedance matching over broadband, each couple of folded dipoles is parallelly connected by stepped coplanar striplines and then excited by a simple feed structure consisting of a 50‐Ω coaxial cable and a rectangular strip. To stabilize the radiation and further improve the impedance matching during an extremely broadband, a rectangular director is utilized and loaded upon each folded dipole. This antenna provides an extremely broad bandwidth of 77.6% (1.68–3.81 GHz) with return loss >15 dB, and good isolation of larger than 25 dB. It also obtains a steady half‐power beamwidth of 66° ± 4° and a gain of 8.6 ± 0.8 dBi during the broadband. This makes it attractive for mobile communication.