Design of Substrate Integrated Waveguide Antenna for 5G Sub-6 GHz and mm-Wave Applications

This project features an antenna that operates in two different frequency ranges: sub-6 GHz (S-Band, centered at 3.7 GHz) and mm-wave (Ka-band, with frequencies of 28 GHz). To achieve dual-band functionality, the design employed a substrate-integrated waveguide (SIW) with a rectangular slot for radiation. Additionally, circular ring resonators (CRR) are integrated as frequency-selective surfaces (FSS) to suppress unwanted signals and enhance overall signal quality. The substrate material used to design the antenna was a Rogers RO4350 dielectric permittivity with εr=3.66. The design focuses on achieving wide bandwidths (approximately 4.85 GHz and 4.14 GHz) for each operating band. This was achieved through careful shaping of the radiating slot and a center-feeding method within the SIW cavity. The importance of these wide bandwidths for efficient data transmission in 5G systems is emphasized. They also highlighted the advantages of dual-band design compared to wideband antennas, including reduced interference with existing communication systems and lower unwanted emissions. Overall, this project presents a promising antenna solution that caters to the growing demands of 5G technology by offering operations in both lower- and higher-frequency bands while maintaining good signal quality and wide bandwidths.