Wide Band Raised Printed Monopole for Automotive 5G Wireless Communications

This paper introduces a compact Multiple input Multiple output (MIMO) antenna system for vehicular application in the sub-6GHz 5G systems that operates in the middle and high frequency bands from 1.71GHz to 5GHz. The proposed design consists of two symmetrical raised printed monopoles on Flame Retardant 4 (FR4) dielectric material with Partial Ground Plane (PGP) structure to improve bandwidth impedance and achieve higher isolation across the operating frequency range. The design is an excellent candidate to be implement in a shark-fin housing due to its low-profile characteristics and good electrical performance. The antennas are simulated using HFSS software and then prototypes are made and measured on a one-meter rolled-edge ground plane in an anechoic chamber. The electrical performance results of the proposed design and its MIMO characteristics are discussed and plotted in terms of Voltage Standing Wave Ratio (VSWR), passive isolation, radiation patterns, radiation efficiency, linear average gain (LAG), Diversity Gain (DG), and Envelope Correlation Coefficient (ECC).