Dual Triangular-shaped DRA Excited with Asymmetric Slot Coupled for Wideband Circular Polarization Applications

This paper investigates dual right-angled triangular-shaped dielectric resonator antenna (DRA) excited with asymmetric slot coupled. Here, the asymmetric slot coupled ground plane is responsible for generating orthogonal modes to realize circular polarization (CP) in the proposed antenna. The designed antenna shows TE
11δ
mode and is confirmed by the rotation of the electric field inside the triangular DRA. This proposed antenna is realized by using dual right-angled triangular dielectric resonators (DRs), which are separated by an optimal gap to be responsible for the generation of wideband CP bandwidth. Proposed antenna shows -10 dB input impedance bandwidth of 20.22% (3.25-3.98 GHz) and 3-dB axial ratio bandwidth in broadside direction of 16.11% (3.31-3.89 GHz). In addition, this antenna offers an average gain and radiation efficiency of 5.64 dBi and 89.00% in the broadside direction respectively. The designed antenna shows right-hand circular polarization and is suitable for Wi-MAX applications (3.3-3.7 GHz).