Horizontally polarized omnidirectional dielectric resonator antenna

This paper presents the concept of using cylindrical dielectric resonator antenna (DRA) as horizontally polarized omnidirectional antenna. The design is achieved through the excitation of the TE_01δ mode in the dielectric cylinder, a mode traditionally exploited in the filtering operation of dielectric resonators. As the mode is intrinsically narrow band, an air gap is introduced in the design and a dual point feeding network is optimized to achieve a wider impedance bandwidth with radially symmetric radiation patterns. The experimental results show a good agreement with simulation and demonstrate omnidirectional operation with horizontal polarization over a bandwidth of 5.6% around the center frequency of 3.9 GHz.