Design of Linear 2 × 2 Array Using Substrate-Integrated-Waveguide Patch Antenna for 28GHz mm-Wave Applications

Abstract

In this paper, a modified and substrate integrate wave guide-fed linear array patch antenna is designed for 28GHz millimeter-wave applications. In the first step, patches are placed in $2\\times 2$ array structure and the patches are excited by slots to each element. In the subsequent design, number of port has been reduced from N2 to N. By using this arrangement only two ports are used for $2\\times 2$ array antennas. Using this method of feeding, fabrication cost and circuit complexity are reduced. The Substrate integrated wave guide (SIW) feeding technique provides, minimal amount of side-lobe power level and side lobe suppression. The proposed system has reflection co-efficient of 22.5dB over the band and average gain values of 9.2dBi were obtained. This method also has good VSWR in entire operating band (center frequency of 28GHz). Moreover, it is easy to integrate with RF circuits and also it finds the application in future 5G mobile communications.