A Review on MIMO Antennas Employing Diversity Techniques
نویسندگان
چکیده
Multiple-input-multiple-output (MIMO) technology is a generic term used to describe techniques proposed to improve capacity, bandwidth efficiency or data rates for the next generation wireless communication systems. MIMO systems integrate multiple antenna elements with adaptive signal processing to provide smart array processing, diversity combining or spatial multiplexing capability. The performance of a MIMO system depends on the correlation properties of its multipath signal. Low correlation between multipath signals is desired to improve channel capacity. This is achieved by exploiting antenna elements that can provide diversity via its spatial configuration, polarization potential or radiation pattern characteristics. This paper shall provide a review of the various MIMO antenna designs that focuses on spatial, polarization and pattern diversity, and its impact on performance. Issues on size, cost and implementation complexity will also be highlighted.
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