UNIPLANAR UWB-MIMO ANTENNA WITH HIGH ISOLATION BASED ON A RADIATOR-GROUND SHARED STRUCTURE

This letter presents a uniplanar two-port UWB-MIMO antenna with high isolation for wireless communication applications. The designed antenna is composed of a single metal layer and a thin substrate. The single metal layer acts as radiators and a ground plane. The radiator of each element consists of a modified dual-L-shaped feeding structure and a defected rectangular patch, which is shared by the ground plane. The modified dual-L-shaped feeding structure is introduced to broaden the bandwidth. Furthermore, two fork-shaped slots and bent slots are embedded in the rectangular shared structure for further improving the bandwidth and decreasing the mutual couplings without any other additional decoupling structures. The experimental results show that the proposed antenna achieves the ultra-wide impedance bandwidth (3.0-12.4 GHz), high isolation (> 20 dB at entire impedance bandwidth), very small ECC (< 0.01), high multiplexing efficiency (> -1.9 dB), stable realized gain, and radiation patterns. Therefore, the designed antenna is suitable for most wireless UWB communication applications.