Dual-band Dual-polarized Hybrid Cylindrical Dielectric Resonator Antenna for Wireless Applications

This article presents design and analysis of dual-band dual-polarized hybrid dielectric resonator antenna for WLAN/WiMAX applications. Four important features of proposed article are: (i) Hexagon shaped aperture is act as radiator and feeding structure for cylindrical DRA (CDRA); (ii) dual hybrid radiating modes (HEM11d and HEM12d mode) are generated in CDRA with broadsided radiation characteristics; (iii) circular polarization (CP) characteristic in upper frequency band is formed by stuffing quarter annular line with straight microstrip line; (iv) sense of polarization of CP wave can be controlled by changing the position of quarter annular line. The parametric analysis of proposed antenna design has been carried out on HFSS EM simulator. The optimized results are verified by CST-MWS. The proposed antenna design is operating over two frequency ranges, i.e., 2.58-2.96 GHz and 4.83-5.93 GHz with the fractional bandwidth 13.71% and 20.44% respectively. 3-dB axial ratio bandwidth is approximately 8.09 % (4.83-5.35 GHz) in upper frequency band.