Wideband High Gain Antenna Using a Slot Loading and FSS for 5G Application

Abstract

In this study, an inset fed rectangular patch antenna is designed for 5G application. The proposed antenna has been designed by utilizing a U-shaped lot loading technique introduced on ground plane for bandwidth improvement. The designed antenna is integrated with parasitic patch as FSS unit cell in order to obtain gain improvement. FR-4 substrate with (εr  4.4 and tanδ  0.02) is used to design the antenna. The bandwidth and gain parameters are improved by altering the length of the ground plane initially and frequency selective surface (FSS) placed at the back of the substrate to enhance the radiation property of the antenna. Bandwidth improvement of 30 % is obtained for proposed wideband high gain antenna compare to conventional inset feed patch antenna. Maximum gain obtained for proposed wideband high gain antenna is 6 dB at 25 GHz. The obtained return loss is also well below 10 dB range from 24.57 GHz to 27.57 GHz. Bandwidth obtained for the proposed antenna is 3.0 GHz. Slot loading technique with ground optimization is useful for bandwidth improvement without affecting radiation pattern of the antenna. Further FSS integration is an efficient approach to improve the gain of convention antennas. The proposed antenna features good characteristics in terms of return loss, gain and bandwidth which makes it highly suitable for 5G applications in mm-wave band.