Wideband and Bandwidth-Controllable Hybrid-Cylindrical Glass Dielectric Resonator Antenna for Indoor Communication

Abstract

In this paper, a wideband and bandwidth-controllable hybrid-glass dielectric resonator antenna (DRA) excited by a probe platform is proposed. The proposed hybrid-glass DRA simply consists of a probe platform and a solid cylindrical glass DRA unit, making the fabrication easier. The probe mode and the TM 01δ mode of the cylindrical glass DRA are employed to design the wideband antenna. It is found that the impedance bandwidth of this hybrid-DRA can be controlled by the height of the glass DRA in a wide range of ∼23%-70%, without changing the size of the feeding. Engineering formula considering the bandwidth has been given to facilitate the design. To demonstrate the idea, three wideband hybrid-glass DRAs with their measured impedance bandwidths of 39.5%, 56.6% and 74% have been designed. To upgrade the three hybrid-glass DRAs as the artistic antennas, laser-engraving patterned glass is employed to do the fabrication again. The measured results show that the performance of the hybrid-glass DRAs with and without patterns are basically the same. INDEX TERMS Hybrid-glass dielectric resonator antenna, wideband, bandwidth-controllable.

Design of the Wideband and Low-Height Omnidirectional Cylindrical Dielectric Resonator Antenna Using Arced-Apertures Feeding

“…For indoor communication, omnidirectional antenna has gained in popularity because it is able to provide a relatively wide coverage. In the past three decades, a large number of studies have shown that the dielectric resonator antenna (DRA) [1], [2], [3], [4], [5] owns the merits of low loss, high radiation efficiency and controllable bandwidth. In addition, the electric dipole mode (TM-mode) of the DRA providing the omnidirectional radiation pattern is very easy to be excited [6], [7], [8], [9], making it a good candidate for designing the omnidirectional antenna.…”