A Differential Broadband Dual-Polarized Base Station Antenna Element for 4G And 5G Applications

In this paper, a broadband differential feed ± 45° dual-polarized base station antenna element is proposed for 4G and 5G mobile communications. The proposed antenna consists of two orthogonally placed dipoles, square patch and reflector, where each dipole adds six elliptical branches to broaden the bandwidth. Simulation results show that the proposed antenna element has the impedance bandwidth of 65% (1.84-3.6 GHz) within the operating frequency $(\mathrm{S}_{11}\, \lt -15$ dB and $\mathrm{S}_{21}\, \lt -21$ dB), and good radiation characteristics and high cross polarization ratio are also achieved.

[1]  Wenxing An,et al.  Low-Profile and Wideband Microstrip Antenna With Stable Gain for 5G Wireless Applications , 2018, IEEE Antennas and Wireless Propagation Letters.

[4]  Quan Xue,et al.  A Differentially-Driven Dual-Polarized Magneto-Electric Dipole Antenna , 2013, IEEE Transactions on Antennas and Propagation.

[5]  Qing-Xin Chu,et al.  An oval-shaped broadband ±45° dual-polarized base station antenna for 2G/3G/LTE applications , 2017, 2017 Sixth Asia-Pacific Conference on Antennas and Propagation (APCAP).

[6]  Qi Wu,et al.  A Broadband ±45° Dual-Polarized Multiple-Input Multiple-Output Antenna for 5G Base Stations with Extra Decoupling Elements , 2018, Journal of Communications and Information Networks.