Miniaturized Aperture Dual-Polarized Folded-dipole Antenna

This article presents a miniaturized aperture dual-polarized folded-dipole antenna. The aperture is reduced by loading vertical metal columns (VMCs) in the four corners of the horizonal square radiator. At the same time, the impedance matching of the antenna with VMCs (VMC-ant) can be improved. Simulated results show that the proposed antenna can operate from 1.7 to 2.3 GHz with VSWRs $< \mathbf{1}.\mathbf{5}$. Stable antenna gain (about 7.8 dBi) is also achieved over the entire operating frequency band. Furthermore, the size of the proposed antenna is $\mathbf{0}.\mathbf{253}\boldsymbol{\lambda}_{\mathbf{0}}\times \mathbf{0}.\mathbf{253}\boldsymbol{\lambda}_{\mathbf{0}}\times \mathbf{0}.\mathbf{253}\boldsymbol{\lambda}_{\mathbf{0}}$ ($\boldsymbol{\lambda}_{\mathbf{0}}$ is the free-space wavelength at 2GHz). This design approach may provide a feasible solution to realize miniaturized aperture of antenna.