SIW CAVITY LOADED WITH DUMBBELL SHAPED SLOT ANTENNA FOR WIDEBAND APPLICATIONS

Substrate Integrated Waveguide (SIW) technology is significant in the design and development of modern communication systems, telecommunications, aerospace, automotive healthcare, radar and in sensing technologies owing to its unique combination of performance, integration capabilities and cost-effectiveness. This paper is designed a microstrip patch antenna with applied SIW on dumbbell shaped antenna is focused to obtain high bandwidth and high gain and directivity with minimum reflection coefficient value. The dimensions 38mm*28mm*1.575mm (L×W×t) of the proposed antenna, excited with micro strip line feeding technique. The antenna is resonated at 15.27GHz and 15.47GHz frequencies. The VSWR values are 1.06 and 1.08 which represents the antenna is a good matching with the ideal value of 1.0. The low VSWR represents efficiency is increased significantly in the transmission line and reflected energy values are negligible. The bandwidth achieved is 1.38GHz. The gain achieved with the proposed antenna is 4.4dB. Directivity, electric field distribution and current distribution parameters are also considered to evaluate the performance of the antenna. The results extracted with the proposed antenna is compared with other existing slot antennas shows superior results. This antenna can be used for wide band communication applications specifically in the domain of aerospace and medical era.