Wideband dual-polarized all-metal cross-dipole antenna with feeding column

A wideband dual-polarized all-metal dipole antenna with a novel feeding structure was proposed in this paper. The antenna mainly consists of five parts, which are metal dipole, feeding column, cross feeding sheet, coaxial line and ground plane. A new type of feeding column is introduced between the feeding coaxial and the dipole, which can improve the impedance performance of the antenna at high frequency range. To verify the design, the antenna unit was processed with the size of 0.47λ0 × 0.47λ0 × 0.31λ0. where λ0 is the wavelength of the middle frequency. From the measured results, the antenna achieves a relative bandwidth of 83.5% (3–7.3 GHz) with a reflection coefficient