Broadband Low-Profile Multifunctional Dual-Polarized Dipole Antenna Based on Orthogonal Key Parameters Joint Optimization Method

In this paper, a novel orthogonal key parameters joint optimization method is proposed, which achieves broadband by extracting the orthogonal key parameters of the balun and optimizing them by the Particle Swarm Optimization (PSO) algorithm. Based on the method, a proof-of-concept multifunctional dual-polarized dipole antenna is presented, achieving broadband coverage with a simple structure and low profile ($0.14 \lambda_{0}$), which can be applied to 5G and Wifi indoor base stations.