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A MIMO Antenna Design Challenges for UWB Application

By M. Jusoh, M. F. Jamlos, M. R. Kamarudin and F. Malek


Abstract—This paper proposes a compact printed ultra-wideband (UWB) multiple-input-multiple-output (MIMO) antenna with a dimension of 38 × 91 mm2. The presented UWB-MIMO antenna comprises two identical patch elements with D separation distance on the same substrate. The basic single antenna structure has a novel design comprising seven circles surrounding a center circle with partial ground plane implementation. Furthermore, the experimental antenna has peak gain of 5.3 dBi between an operating frequency of 2.8 GHz and 8.0 GHz under a minimum reflection coefficient of less than −10 dB (S11 < −10 dB). Moreover, the antenna successfully achieved mutual coupling minimization of < −17 dB, eventually resulting in enhancement of radiation efficiency. Besides, the UWB-MIMO’s correlation coefficient was effectively reduced to less than −22 dB, which reflected an improvement in the antenna’s diversity. In this paper, the proposed antenna is examined both numerically and experimentally. 1

Year: 2012
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