Abstract
A dual-band ten-element MIMO array based on dual-mode inverted-F antennas (IFAs) for 5G terminal applications is presented in this paper. The proposed dual-mode IFA is composed of two radiators, which are etched on the outer and inner surfaces of the side-edge frame. The outer part of the antenna generates the low-order mode at 3.5 GHz, while the inner part radiates another one-quarter-wavelength mode at 4.9 GHz. In this way, the IFA can achieve dual-band operation within a compact size of 10.6 × 5.3 × 0.8 mm 3 . Based on the proposed antenna, a dual-band ten-element multiple-input and multiple-output (MIMO) array is developed for 5G terminal applications. By combining neutralization line structures with decoupling branches, the isolations between the elements are improved. To validate the design concept, a prototype of the ten-element MIMO array is designed, fabricated, and measured. The experimental results show that the proposed antenna can cover the 3.3-3.6 GHz and 4.8-5.0 GHz bands with good isolation and high efficiency. Furthermore, the envelope correlation coefficient (ECC), and channel capacity are also calculated to verify the MIMO performances for 5G sub-6GHz applications.
Highlights
In recent years, to meet the increasing requirements of high communication capacity, low time delay, and massive connection density, the fifth-generation (5G) mobile communication system with multi-band, high isolation and ergodic channel capacity is in urgent need
To validate the above design concept, an antenna prototype of the proposed dual-band ten-element multiple-input and multipleoutput (MIMO) array with the optimized dimensions was fabricated and measured
Because of the symmetric layout of the ten-element MIMO array, only the result of Ant 1 to Ant 5 are shown in the figure for brevity
Summary
To meet the increasing requirements of high communication capacity, low time delay, and massive connection density, the fifth-generation (5G) mobile communication system with multi-band, high isolation and ergodic channel capacity is in urgent need. Several four-element MIMO arrays for terminal applications working at the sub GHz band have been reported in [1]–[4]. These four-element MIMO arrays showed the relatively low channel capacity due to the small number of antenna elements. By using eight monopoles as the elements, a MIMO array with good ergodic channel capacity of 40 bps/Hz was presented in [5] This design suffered from low isolation between the antenna elements. A dual-band ten-element MIMO array based on dual-mode IFAs is proposed for 5G terminal applications. To evaluate the robustness of the antenna performances, the user’s hand effects are studied
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