A Miniaturized MIMO Antenna With Triple Band-Notched Characteristics for UWB Applications

In this paper, a novel compact four-element ultra-wideband (UWB) multiple-input multiple-output (MIMO) antenna with triple band-notched characteristics is proposed. The proposed composed of four slot elements common rhombic slot, each feeding by microstrip-fed line to greatly reduce the overall size antenna. It has 34 mm $\times34$ notation="LaTeX">$\times1.6$ mm. high isolation and polarization diversity are achieved placing lines perpendiculars other, while parasitic strip employed as decoupling structure between adjacent further improve isolation. Moreover, can achieve embedding L-shaped C-shaped slots on radiator loading electromagnetic band gap (EBG) structures next micro-strip feeders respectively. As result, obtains three notched bands 3.3-3.9 GHz, 5-6 7.4-8.5 which in good agreement interference WiMAX (3.3-3.7 GHz), WLAN (5.15-5.875 GHz) X-band (7.3-8.5 prototype been fabricated measured. results show that an impedance bandwidth 2.5-12 GHz (except for bands). Besides, among elements, envelope correlation coefficient, radiation characteristics, efficiency, realized gain, total active reflection coefficient also investigated. experimental indicate be candidate UWB-MIMO wireless communication applications.