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Description
The dielectric resonator antenna (DRA) has taken the role of conventional radiating antennas with its superiority in radiation gain and efficiency such as microstrip and dipole antenna. These are particularly useful for high frequency applications. In this work, a cylindrical dielectric resonator antenna (CDRA) with coaxial probe feed at different position has been designed and briefly examined. The designed structures can enhance the bandwidth by introducing air gap and repositioning the coaxial probe feed. The material used as dielectric resonator (DR) is Taconic CER which has a dielectric constant of ~10 and DR is etched on FR-4 epoxy (єr~4.4) and dimensions of (60 × 60) mm. The widely accessible simulation tool Ansys HFSS is used here to design and examine the proposed CDRAs. The various antenna parameters, such as the gain, directivity, voltage standing wave ratio (VSWR), operating bandwidth, and return loss (S11 vs. frequency) curve, are derived and analysed for the proposed CDRA. By introducing air gap within the CDRA, we obtained much wider operational bandwidth compared to solid CDRA. The designed antennas are operating in the range of (2.30 to 5.71) GHz after optimizing the different dimensional modification.
Keywords: Cylindrical Dielectric Resonator Antenna, Coaxial Probe feeding, Bandwidth Enhancement
