A Shared Aperture Dual-Polarized Omnidirectional Antenna Based on CRLH-TL for 5G Applications

In this letter, a novel aperture-shared dual-polarized omnidirectional antenna for 5G application is proposed. To realize the compact and broadband characteristics, the vertically polarization (VP) and horizontal polarization (HP) share a physical region and a Wilkinson power divider with a Z-shaped feeding networks is utilized. Two antenna prototypes are fabricated and measured, with the dimensions are 0.70λ
₀
× 0.70λ
₀
× 0.07λ
₀
and 0.62λ
₀
× 0.62λ
₀
× 0.09λ
₀
for the 3.5 and 5.8 GHz antennas, respectively. The port isolation of the 3.5 GHz antenna is better than 35 dB, with radiation efficiency higher than 85.4%. The measured −10 dB impedance bandwidths of the 5.8 GHz antenna are better than 23.8%. The proposed antennas are suitable for 5G application for their low-profile, compact, broadband, and dual polarization characteristics.