Decoupling design of wideband dual-polarization base station array for 5G communication

In order to solve the coupling problem of the wideband dual-polarization array of MIMO antennas, a decoupling method combining wideband array-antenna decoupling surface (WADS) and cross-type dielectric resonator is proposed, and the decoupling design is verified by simulation of $2 \times1$ compact wideband dual-polarization array antenna. According to the simulation results, the E-plane coupling is increased from -17dB to -22dB, and the H-plane coupling is increased from -18 dB to -25 dB in the 2.1-3 GHz operating frequency band, and the antenna array with decoupling structure still has good radiation characteristics. The decoupling method proposed in this paper has great application potential for broadband dual-polarization base station arrays in 5 G systems.