An Arrangement for Four-Element MIMO DRA With Complementary CP Diversity

An integrated four-element dielectric resonator-based multiple-input-multiple-output (MIMO) polarization diversity antenna is proposed in this letter. The MIMO antenna comprises two microstrip-slot fed dielectric resonator antenna (DRA) elements and two conformal open-loop fed DRA elements. These two different types of antenna elements are intended to radiate in two opposite directions to reduce the field components' interference. This aspect can offer a reliable wireless connection. Also, circular polarization diversity is implemented between the diagonally placed antenna elements to improve the isolation and diversity performance. The measured overlapping impedance bandwidth (S
_ii
<; -10 dB) of 500 MHz (3.22-3.72 GHz) is attained for the proposed MIMO antenna with interport isolations of more than 15 dB throughout the usable frequency band. The proposed MIMO antenna acquires a measured overlapping axial ratio (AR) bandwidth (AR <; 3 dB) of 200 MHz (3.34-3.54 GHz), which covers the 3.4 GHz carrier frequency for the vehicle-to-vehicle and vehicle-to-infrastructure applications.