In this research paper, an optimized 2 × 2 MIMO UWB antenna (antenna-E) with half circled radiators as well as 50 Ω step fed has been introduced. The proposed UWB MIMO antenna has been evolved from recent peer published papers that provide WLAN notch (5.15-5.85GHz), ultra wide band width (3.1-10.6 GHz) and again a very good isolation (−20 dB) also maintained. In this paper the evolutions have been derived from antenna-A to antenna-E. The Ultra wide band is achieved by using step feed line, cutting a metal strip on a partial ground plane, a rectangular slot underneath the feed line of each radiator in antenna-E. A high isolation (−20 dB) is obtained by introducing two inverted Г shaped stubs in the ground plane. Both antenna-D and antenna-E maintain high isolation (−20 dB). But antenna-E performs better isolation compared to antenna-D. The notch at WLAN band (5.15-5.85GHz) is achieved by etching rectangular C-shaped slot on the both the radiators. In antenna-E two radiators are placed horizontally where as in antenna-D two radiators placed orthogonally. It has been observed that the dimension of final outcome (antenna-E) is reduced by 33% compared to antenna-D without compromising the overall performance of the antenna. K E Y W O R D S ECC, MIMO, UWB antenna, WLAN band rejection
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