Simple and Enhanced Gain Dielectric Resonator Antenna for Ku band Application

A simple and compact high gain Dielectric Resonator Antenna (DRA) for Ku band frequency operation is proposed in this paper. Ku band is a microwave band having frequency range 12 to 18 GHz. Proposed DRA is based on the principal of the dual resonance and defected ground structure (DGS) having rectangular slot. DRA design resonates at frequency 15.2 GHz and 18 GHz in Ku band frequency operation. Antenna design offers the minimum return loss of -25 db at 15.2 GHz and -20 db at 18 GHz .This DRA design has simple geometry and shows good directivity that is 10 dbi at 15.2 GHz and 8 dbi at frequency 18 GHz. DRA antenna design also offers high front to back ratio (FBR) of 12.2 db and 7 db at 15.2 GHz and 18 GHz respectively. Proposed antenna design is useful at high directivity application such as satellite communication. Return loss bandwidth achieved is 540 MHz (3 %) for band resonating at 15.2 GHz and 740 MHz (4.2%) for another band resonating at 18 GHz. Simple and compact design with enhanced directivity and FBR is proposed here. DRA is analyzed using Ansoft HFSS based on finite element method. Index Terms — Dielectric resonator antenna, dual resonance, front to back ratio, Ku band. ——————————  ——————————