A Tri-band Antenna for Satellite Applications at C, X and Ku Bands

An ultra-broadband antenna that is compact in size, low cost, single-layer and fed using coaxial probe feed is designed for satellite application at frequency C, X and Ku bands. The antenna consists of a rectangular radiating element with a partial ground plane, which provides a wide bandwidth. The single U-slot was designed in the patch antenna to obtain a tri-band frequency response that covers frequency at C, X and Ku bands in the range of 4 GHz to 8 GHz, 8 GHz to 12 GHz, and 12 GHz to 18 GHz respectively. The features of the antenna was analyzed in terms of radiation pattern, antenna gain and the return loss. The antenna was designed and simulated using CST MW Studio software. The performance of this designed antenna was compared and analyzed by using three different substrate materials which are FR-4, Rogers RT5880 and PTFE. The simulated results obtained from the analysis parts show that Rogers RT5880 is the most suitable substrate material for this designed antenna because it is promising good results which can cover all frequency bands which are C, X and Ku bands and it also have a good return loss, Voltage Standing Wave Ratio (VSWR) and gain as desired.