Abstract
The proposed work focuses on Ultra Wide Band MIMO antenna with band-notch properties suitable for wireless communication. A board area of 30.75 ×29.4 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> comprehends two half octagonal radiating patches with the stub attached to feed line on the top layer while reflector in the ground plane of FR-4 substrate. The antenna operates over 2.77 GHz to 10.28 GHz (UWB) for an impedance matching of S11 <; -10 dB, while rejecting the 4.86 GHz to 6.27 GHz and 7.4 GHz to 9.35 GHz bands. Reflector in ground plane offers isolation of about 15dB which results decoupling path for surface current. The band notch function prevents the interference between UWB and the existing narrow band structures like WLAN (5.15 GHz - 5.85 GHz), WI-Max (5.25 GHz to 5.85 GHz), Dedicated Short Range Communication (5.625 GHz - 5.95 GHz) and ITU Uplink satellite communication band (8.1 GHz - 8.4 GHz). The measured results are in close agreement with simulated one. Additionally, the band notch UWB antenna exhibits a stable radiation pattern and adhere to MIMO standards (Envelope Correlation Coefficient <; 0.5 and Diversity Gain > 9.8dB).
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