Implementation of Phased Array Antenna based on Multilayer fed with Substrate Integrated Waveguide Technology for Beam Scanning Applications

This paper introduces a multilayer-based substrate integrated waveguide-fed phased array antenna for targeting the next group of wireless communications, predominantly in Ku- and K-bands. The proposed work based on a hybrid structure utilizes a high-performance substrate-integrated waveguide feeding network, which facilitates the practical manufacturing of semi-circular microstrip patch antennas whereas dielectric substrates are printed on the circuit boards. The phased antenna array also comprises a printed periodic surface comprising ‘semi-circular’ type cells on an RT5880 dielectric substrate. As an outcome, the propped design reduces mutual coupling between parallel and 45° angular slots and phased array antenna configuration, results show a more compact array structure compared to other decoupling methods. Additionally, the proposed array antenna configuration has embraced a sixteen-element linearly phased array antenna with a wide angle beam with scanning competence. It shows that the phased array antenna scans the main lobe from -40° to $\mathbf{4 0}{ }^{\circ}$ and covers a frequency band from 18.12 to 19.67 GHz with input impedance bandwidth ($S_{11}{\lt}-10$ dB) of $\mathbf{8. 2 0 \%}\left(\mathrm{IBW}=1.55 \mathrm{GHz}, f_{c}=18.89 \mathrm{GHz}\right)$.