Design and Performance Analysis of Two-Port Circularly Polarized MIMO Antenna for UWB Applications

It proposes and simulates a new Ultra-wide (UWB) Multiple Input Multiple Output (MIMO) circular polarization (CP) antenna. The developed antenna’s configuration is uncomplicated and incorporates dual T-shaped feed ports at left and right edges to achieve both LHCP and RHCP at same frequency band. A wide circular slot with a hexagonal stub is created in the ground plane in order to achieve better bandwidth for the realization of UWB. The evolution measures of the antenna put forward are presented ahead in this research paper, and its parameters are designed to obtain the optimal return loss, isolation, polarization, and ARBW. Also, a parametric study is done on various types of materials chosen as substrate. The parametric study results, portrays that substrate with higher dielectric tends to give poor ARBW. Operating bandwidth (S11 <  = –10db) of the planned antenna is obtained to be 6.7 GHz (3.4 to 10.1 GHz). An isolation of more than 15 dB is also achieved. 3 dB ARBW is obtained in the extent of 3.5–5.5 GHz. Furthermore, the circular polarization features of the antenna proposed are favorable. The surface current and radiation patterns obtained illustrates the circular polarization. Both RHCP and LHCP are obtained at the same frequency in this proposed antenna design. This proposed antenna is a solution to orientation problems of transmitter and receiver, complicated designing, multipath fading, and weather penetration. The simulated antenna is a low profile, compact sized antenna simulated for UWB circular polarization and next generation applications.