Bandwidth Enhancement of Substrate Integrated Waveguide Cavity Antenna using T-Backed Slot

Abstract

This paper presents an increase in bandwidth for Substate Integrated Waveguide (SIW) antenna backed by T-shape slot. T-shape slot produces a hybrid resonance mode between TE101 and TE102 modes in a rectangular cavity. Hybrid resonance will increase the impedance bandwidth three times than that of conventional SIW antennas. The antenna performance shows optimized S-parameters, gain and radiation pattern. 3% of fractional bandwidth simulation is achieved and proven by measurement results. Therefore the propose antenna is applicable to fifth generation wireless communications in the frequency range of 3.3-3.4 GHz.