Simulation Study of Quasi Self-Complementary Shared-Radiator for UWB-MIMO Applications

In this paper, a compact QSC UWB-MIMO antenna using shared radiator is presented. The proposed design consists of a radiator which is centrally aligned at an angle of 45° from X-axis. It is symmetrically shared by two microstrip feed lines that results in orthogonal polarization. This made the design more compact as it does not utilize separate feeds for each port. At the bottom side of the substrate, quasi-self complementary structure is used to control the impedance of radiator. Also, an end loaded meandered line attached to the ground offers better isolation. The overall size of the designed antenna is 40 × 40 × 0.8 mm3.The simulated results satisfies the desired reflection coefficients requirement i.e. S 11 S 22 less than or equal to -10 dB and provides mutual coupling of S 21 /S 12 less than or equal to -13 dB over the entire FCC allocated band i.e. 3.1-10.6 GHz. Moreover, all the simulated diversity parameters found suitable for UWB-MIMO applications.