Compact MIMO Antennas with CSRR for UWB Applications

A compact multiple-input-multiple-output (MIMO) antenna with Complimentary split ring resonator is designed for ultrawideband (UWB) applications with notch bands at 3.9-5.6 GHz and 7.5-8.9GHz. The antenna consists of two L-shaped slot (LS) antenna elements. The antenna elements are placed perpendicularly to each other. A decoupling T-shaped stub is used for high isolation. Complimentary split ring resonator is introduced on the patch to obtain notch bands. A small portion of triangle is cut at corner of the patch to get circular polarization. The measured results show that the proposed antenna design achieves an impedance bandwidth of 3.1–10.6 GHz.The overall size of the antenna is 32 x 32 x 0.8 mm ³ .