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Low-Interacted Multiple Antenna Systems Based on Metasurface-Inspired Isolation Approach for MIMO Applications

  • Research Article-Electrical Engineering
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Abstract

This paper investigates a simple method based on the metasurface concept to suppress the mutual-coupling between the radiation parts of a 2 × 2 antenna-arrays. The array-antennas have constructed of four circular-patches implemented on the FR-4 substrate, so each patch has separately excited by a waveguide-port. The proposed decoupling-approach inspired the metasurface principle has applied by realizing the rectangular-slots in a linear and series configuration incorporated between the antennas to decrease their interaction and reduce the surface-waves. The proposed slots act like series left-handed capacitors. To achieve more isolation, the metallic via-holes have employed between the rectangular-slots across the substrate-layer, which has caused to suppress the substrate-losses. The via-holes behave like shunt left-handed inductors. By incorporating series slots and via-holes, the metasurafce-inspired decoupling-slab has realized without increasing the physical dimensions. The results show that by the proposed method the substrate-loses, surface-waves, and interaction between the radiation elements have significantly diminished and as resultant the array's performances such as impedance bandwidth, fractional bandwidth, impedance matching, isolation between antennas #1&#2, #1&#3, #1&#4, radiation gain, and efficiency have improved by 2.1 GHz, 21.2%, 4 dB, 12 dB, 16 dB, 13 dB, 3.2 dBi, and 23%, respectively, which exhibit the effectiveness of the proposed metasurface-based isolation-slab. The fabricated proposed 2 × 2 array-antennas with compact dimensions of 40 \(\times \) 40 \(\times \) 0.8 mm3 and edge-to-edge distance between the radiation components of 0.16 \({\lambda }_{0}\) operates over approximately entire X-band spectrum of 8.2–12 GHz, which corresponds to 37.62% practical bandwidth. The array antennas exhibit an average efficiency and gain of 76% and 8.5dBi, which enable it to be applicable for MIMO systems.

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Acknowledgements

The author extends his appreciation to the Deanship of Scientific Research at Jouf University for funding this work through research grant No (DSR-2021-02-0115).

Funding

The author extends his appreciation to the Deanship of Scientific Research at Jouf University for funding this work through research Grant No (DSR-2021–02-0115).

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Authors and Affiliations

  1. Department of Electrical Engineering, College of Engineering, Jouf University, Sakaka, Aljouf, 72388, Saudi Arabia

    Ayman A. Althuwayb

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  1. Ayman A. Althuwayb
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Correspondence to Ayman A. Althuwayb.

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Althuwayb, A.A. Low-Interacted Multiple Antenna Systems Based on Metasurface-Inspired Isolation Approach for MIMO Applications. Arab J Sci Eng 47, 2629–2638 (2022). https://doi.org/10.1007/s13369-021-05720-6

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  • DOI: https://doi.org/10.1007/s13369-021-05720-6

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