A compact 4×4 ultrawideband(UWB) band notched MIMO antenna

A compact ultra-wideband (UWB) with wireless local area network (WLAN) rejection capability multiple input multiple output (MIMO) is presented in this paper. The proposed UWB MIMO antenna has very good isolation between antenna elements. It has the isolation better than 20 dB over the entire UWB band. The rectangular slots introduced in the ground plane in order to obtain good isolation. A λ/2 C-shaped slot is introduce in the radiator in order to have band reject characteristics. The proposed antenna is fabricated and measured to verify the present concept of design. The measured results are in good agreement with the simulated ones. The UWB MIMO antenna has a compact size of 40 mm × 40 mm. This compact size along with good UWB characteristics make this antenna good candidate for UWB MIMO systems.