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A Compact Self-Isolated MIMO Antenna System for 5g Mobile Terminals

Computer Systems Science & Engineering 2022年第9期42卷 919-934页

作者： Muhannad Y.Muhsin Ali J.Salim Jawad K.Ali Microwave Research group Department of Electrical EngineeringUniversity of TechnologyBaghdad10001Iraq Microwave Research group Department of Communication EngineeringUniversity of TechnologyBaghdad10001Iraq

A compact self-isolated Multi Input Multi Output (MIMO) antennaarray is presented for 5g mobile phone devices. The proposed antenna systemis operating at the 3.5 gHz band (3400–3600 MHz) and consists of eight antennaelements placed along two side edges of a mobile device, which meets the currenttrend requirements of full-screen smartphone devices. Each antenna element isdivided into two parts, a front part and back part. The front part consists of anI-shaped feeding line and a modified Hilbert fractal monopole antenna, whereasthe back part is an L-shaped element shorted to the system ground by a0.5 mm short stub. A desirable compactness can be obtained by utilizing the Hilbert space-filling property where the antenna element’s overall planar size printedon the side-edge frame is just (9.57 mm × 5.99 mm). The proposed MIMO antenna system has been simulated, analyzed, fabricated and tested. Based on the selfisolated property, good isolation (better than 15 dB) is attained without employingadditional decoupling elements and/or isolation techniques, which increases system complexity and reduces the antenna efficiency. The scattering parameters,antenna efficiencies, antenna gains, and antenna radiation characteristics areinvestigated to assess the proposed antenna performance. For evaluating the proposed antenna array system performance, the Envelope Correlation Coefficients(ECCs), Mean Effective gains (MEgs) and channel capacity are *** antenna and MIMO performances are evaluated to confirm the suitability of the proposed MIMO antenna system for 5g mobile terminals.

关键词： 5g applications compact antennas isolation techniques MIMO antennas mobile terminals self-isolated antennas

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