Orthogonal Polarized Omnidirectional Antenna Composed of Halo Antenna with Parasitic Elements and Dipole Antenna

This paper proposes a small-diameter, low-profile and an omnidirectional orthogonally polarized antenna composed of a Halo antenna and a dipole antenna. As a result of the simulation, the characteristics of the proposed antenna are that the relative bandwidth is 8.8%, and the antenna height and diameter are $0.45\lambda_{0}$ and $0.13\lambda_{0}(\lambda 0$ the wavelength of the center operational frequency), respectively.