Miniaturized dual-band dielectric resonator antenna for IEEE 802.16d fixed WiMAX applications

A miniaturized dual-band C-shaped dielectric resonator antenna (DRA) with partial ground plane is presented for IEEE 802.16d fixed WiMAX applications at 3.5 and 5.8 GHz. The design starts with dimensioning a single band cylindrical DRA, which has been transferred to get a dual-band ring-shaped DRA. One portion of the ring-shaped DRA is removed for forming a C-shaped DRA to get a more compact antenna. For easy fabrication, the compact DRA dimensioned as 60 × 50 × 6.6 mm3 is excited by a microstrip line feeding. The design parameters are inner and outer radii of the C-shaped antenna and air gap (between DR and ground) to control both the resonating frequency and the quality factor. The result shows peak gain around 3.26 and 5.55 dBi at 3.5 and 5.8 GHz, respectively. The obtained results indicate very good agreement between the simulated and measured results.