Abstract
The use of multiple-input-multiple-output (MIMO) antenna systems will be required by next generation wireless systems to achieve their high throughput data transmissions. In this work, the authors present the design and fabrication of a 2 - 2 MIMO antenna system for the 700-MHz band of the long-term evolution (LTE) wireless standard. The MIMO antenna system is based on a novel 4-shaped antenna geometry that is compact in size and covers two bands of operation. The dual-band 2 - 2 MIMO antenna system covers the 734-790-MHz and the 2307-2475-MHz LTE and industrial, scientific and medical (ISM) bands. It occupies an FR-4 material substrate size of 58-110-1.56-mm 3 . The antenna has frequency tuning capabilities without changing the over all size of the MIMO system substrate. Several isolation enhancements methods were investigated, and the values of the correlation coefficient (|ρ| max ) were within the LTE requirements. The maximum obtained gain for a single operating antenna at 770 and 2380 MHz was 5 and 4.5 dBi, respectively.
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