Defected ground structured compact MIMO antenna with low mutual coupling for automotive communications

摘要

This paper presents the analysis of a T-stub loaded two element MIMO antenna placed in the vehicular environment at different positions on the vehicle. The MIMO antenna consists of two collinear printed dipoles as the elements. It operates for millimetre wave frequencies from 24.6-42.1 GHz and 50.1-52.5 GHz with a bandwidth of 17.5 GHz and 2.4 GHz respectively. The two elements of the MIMO antenna have the minimum mutual coupling of -89.5dB over the operating band. The envelop correlation coefficient (ECC) of the MIMO antenna is less than 0.01 throughout the band and the diversity gain (DG) is about 10. The MIMO antenna is placed at four different positions on the vehicle in virtual vehicular environment using ANSYS SAVANT. The measured results are matching with the simulation results and the proposed MIMO antenna can be used for future 5G communications for different automotive applications.