A Low-Profile Dual-Polarized Wideband Antenna for 5G Massive MIMO Base Station
Wei Huang, Yejun He, Wenting Li, Long Zhang, Sai‐Wai Wong, Zhi Zeng
Abstract
This paper presents a novel low-profile patch antenna with dual-polarization for 5G base station. It consists of a radiation patch and a feed patch. The coupled feed patch excites the radiation patch for dual-polarization. The edges and corners of these two patches are regularly cut to improve impedance matching. There is only a substrate trestle between the two patches, which is a simple structure with low processing cost. The operating frequency range of the patch antenna is 3.3-3.7 GHz, and the size is only 0.37λ×0.37λ×0.1λ (λ is the wavelength of 3.5 GHz). The simulation results show that the proposed antenna reaches the reflection coefficient |S<inf>11</inf>|, |S<inf>22</inf>|<-15 dB, port isolation |S<inf>21</inf>|<-19 dB, and cross-polarization discrimination (XPD) greater than 27 dB in the operating frequency band. In addition, an 1×3 antenna array is designed based on this antenna element. The antenna array achieves reflection coefficients |S<inf>11</inf>|, |S<inf>22</inf>|<-10 dB, and port isolation |S<inf>21</inf>|<-20 dB in the 3.3-3.7 GHz frequency band. The half-power beam width of H-plane is between 65°-76°, and the radiation pattern is symmetrical and stable. The potential of this antenna in 5G massive multiple-input multiple-output (MIMO) application has been verified.