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%.
