High Gain Broadband Antenna/Array for Ku Band Satellite Communication

Abstract

A novel type of transmission line that has gained popularity recently is the sub strate integrated waveguide (SIW). A rectangular waveguide is created inside a sub strate by putting a top metal over the ground plane and encircling either side of the structure with plated vias arranged in rows. Four rows of metallic vias and two metallic plates on the top and bottom of the substrate combine to create the square SIW cavity.Additionally, the ground coplanar waveguide feeding structure ignite the high-order resonant modes inside the subcavity, and by placing the high-order modes close to one another, the broadband impedance bandwidth may be accomplished.The interaction of the slot, SIW structure and feeding structure in the high gain broad band antenna array for ku band satellite communication helps to excite high-order modes.The first phase of project results investigates a 2x1 antenna array which shows a high bandwidth and gain. It was realized using the slot geometry at the backed substrate. The simulated results show that the antenna array radiates at the follow ing three frequencies of 11.6GHz,12.95GHz and 13.9GHz. A peak gain of 9.5 dBi was observed at 20.4 GHz. Second phase of project deals with the design of high gain broadband SIW antenna for KU band satellite communications. The design was realized using a SIW modified flower slot dumbbell shaped antenna. The proposed design demonstrated a gain of 9dBi and impedance bandwidth of 16.36%.