Orthogonal Polarization Omnidirectional Antenna Using a Halo Antenna Loaded with Short Elements

Abstract

This paper proposes a low-profile orthogonally polarized antenna. The proposed antenna is composed of a sleeve antenna as a vertically polarized element and a Halo antenna with parasitic elements as a horizontally polarized element. Two short elements are loaded symmetrically with the gap of the Halo antenna to achieve an orthogonal polarization antenna that is omnidirectional in both polarizations. The validity of the simulation results was confirmed by fabricating the proposed antenna.