Puli, N.Goud, M.Kandasamy, K.2026-02-0620227th IEEE International Conference on Recent Advances and Innovations in Engineering, ICRAIE 2022 - Proceedings, 2022, Vol., , p. 373-376https://doi.org/10.1109/ICRAIE56454.2022.10054254https://idr.nitk.ac.in/handle/123456789/29779This paper proposes half-mode substrate integrated waveguide cavity-based slot antenna with high gain and ultra-wideband characteristics. The compact size of 38.4mm X 8mm X 0.787mm and high gain is achieved using the narrow rectangular half-mode SIW cavity. A periodic arrangement of the bubbled slots is introduced to obtain wideband operation with an impedance bandwidth of 2.16GHz i.e., from 13.5 GHz to 15.66 GHz. In addition, the proposed design provides gain varying from 9.5 dBi to 10.6 dBi in the required frequency of operation. Radiation pattern reveals that the front-to-back ratio (FTBR) of 19.56 dB and radiation efficiency greater than 93%, is accomplished over the complete band of operation. The proposed antenna is best suitable for small satellite designs in Ku-band and is designed on an Rogers RT/Duroid 5880 substrate (with a thickness of 0.787 mm) and simulations were carried out in the Computer simulation technology studio suite. The simulation results demonstrates novel antenna design with adequate gain and bandwidth requirements for high gain practical applications. © 2022 IEEE.front-to-back ratioHalf-mode substrate integrated waveguidehigh gain