Hexagonal Hybrid DRA Circularly Polarized Antenna for Multiband Applications

In this work, a hybrid structure containing a hexagonal microstrip patch antenna with hexagonal rings loaded with a Dielectric Resonator (DR) is presented. The length of the hexagonal patch and DR is 10 mm. The height of Al2O3 ceramic DR is 7mm with an overall dimension of the proposed antenna of 51x45x1.6 mm
³
. The proposed antenna operates over multiple frequency ranges resulting in bandwidths of 30MHz (4.38–4.41 GHz), 230MHz (6.99-7.22 GHz), 100MHz (7.84–7.94 GHz), 650MHz (9.82–10.47 GHz), 110MHz (11.31–11.42 GHz), 70MHz (12.04–12.11 GHz), 340MHz (12.33-12.67 GHz) and 150MHz (13.03–13.18 GHz). The peak gain of the antenna is observed to be 6.61 dBi at 10.28 GHz and circular polarization characteristics are observed over the multiple frequencies ranges with a bandwidth of 210MHz (6.73-6.94 GHz), 100MHz (7.22-7.32 GHz), 90MHz (9.16-9.25 GHz), 140MHz (9.67-9.81 GHz), and 130MHz (11.42-11.55 GHz). Using bent microstrip line feed, two orthogonal modes are created resulting in CP radiation. The proposed antenna is suitable for C, X, and Ku band applications. The simulations are carried out using HFSS software.