Abstract
This paper presents a small size metamaterial antenna for MIMO wireless applications. The proposed MIMO antenna consists of two antennas each operates at 5.8GHz. The two antenna elements are designed employing only one composite right/left handed unit cell. The two antenna elements are combined together with small separation between them. The separation between the edges of the two elements has been achieved to be only 0.034 λ0. As a new approach, the reduction of mutual coupling depends on current cancellation between the two antennas without using additional structures. The proposed antenna achieves better than 40dB isolation between the two inputs. In addition to the high isolation between the antenna elements and the small spacing between antenna elements, the proposed antenna has compact size (its size is only 30 X 26 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> ). The design represents size reduction of approximately 65 % compared to conventional patch antennas operating at the same frequency. The antenna is fabricated and measured. A good agreement between simulated and measured results is achieved.
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