Evolution of broadband antennas from monopole disc to dual-polarized antenna

The demand for broadband wireless communication is rapidly increasing due to the need to support more users and to provide more information with higher data rates. Wideband antennas are essential front-end elements for broadband wireless communications. In several applications, it is also desirable for broadband antennas to have dual-polarization, especially for advanced wireless communication systems employing diversity and MIMO techniques. Most broadband antennas reported in the literature are forms of monopole, dipole, or crossed-dipole antennas. This paper summarizes broadband antennas and proposes an evolution process from the monopole disc antennas to broadband dual-polarized antennas.