Planar wideband circularly polarized dielectric resonator antenna

Abstract

A wideband and compact circularly polarized (CP) C-shaped dielectric resonator antenna (DRA) is presented. The proposed C-shaped DR is excited by a microstrip feed in one side of the dielectric substrate. DR is housed inside the thin dielectric substrate above the vertical ground plane edge. By using one narrow short circuit strip, CP bandwidth of the proposed antenna is enhanced. The final design achieves CP with 44% axial ratio (AR) bandwidth. The proposed circularly polarized DRA with good radiation characteristics offers an impedance bandwidth of 67% between 3.35 and 6.76GHz for VSWR < 2. © 2013 IEEE

A state-of-art review on performance improvement of dielectric resonator antennas

“…The circular polarization literatures which deal with some miscellaneous performances are separately discussed in this section. Li and Leung has been studied a DRA with an Alford loop loaded at the top for circular polarization.…”

“…The circular polarization literatures which deal with some miscellaneous performances [159][160][161][162][163][164][165][166] 160 have designed a square DRA is mounted on the edge of the substrate excited with a microstrip line. For CP a 458 rotated square notch is drilled inside the DRA and the microstrip line ids designed to be at the right of the DRA.…”

“…For case of single point feed, the shape of the resonator plays the crucial role to generate spatially orthogonal modes, while in multipoint feed, this can be generated by the feeding network and independent of the shape of the dielectric resonator . In case of DRA, the research on only circular polarization and circular polarization with other charateristics are quite remarkable.…”

Bandwidth Enhancement of rectangular dielectric resonator antenna using circular and sector slot coupled technique

“…In this technology, defects of certain lattice forms are etched in the ground plane that will disturb the current distribution in the microwave structure [1] [2]. Recently, the operated bandwidth of antennas using DRAs have been further improved for ultrawideband applications [3] [4][5] [6]. Aperture coupling, probably one of the most common feeding structures, consists in coupling energy into the resonator through an aperture in its ground plane.…”

“…Two cylindrical dielectric resonators, which are asymmetrically located with respect to the center of rectangular coupling aperture, are feds through the aperture of the ground plan with a slotted microstrip line antenna. By optimizing the design parameters, an impedance bandwidth of about 46%, covering the frequency range from 9.1GHz to 14.6 GHz, and a simulated gain of 8dBi are obtains [4]. In [7], a DGS annular ring was examined.…”