Research Output

Compact and closely spaced tunable printed F-slot multiple-input–multiple-output antenna system for portable wireless applications with efficient diversity

  In this work, miniaturised tunable two-antenna multiple-input–multiple-output (MIMO) systems composed of printed F-slot shaped are developed to operate in the global positioning system (GPS), personal communication system (PCS), distributed control system and Universal Mobile Telecommunications System bands. The two-element MIMO antenna occupies a volume of 50 × 37.5 × 1.6 mm3, and is printed on an FR4 substrate. Initially, the frequency tunability of the MIMO antennas was verified by lumped capacitors with values between 0.75 to 2.75 pF to achieve a tuning range from 1.55 to 2.07 GHz while the low mutual coupling between the radiators was accomplished by adding an I-shaped branch to a cut-away ground plane. The two antennas are then loaded with varactors to simultaneously achieve miniaturisation and tunability. Simulation and measurement results demonstrate the successful implementation of a tunable MIMO with coupling reduction mechanism for a portable handheld wireless transceiver. The channel capacity of the proposed antenna is investigated and found to be close to that of a un-correlated system with efficient diversity in which the mutual coupling across the full bandwidth was better than −13 dB. Owing to the compact size and ease of manufacture, the proposed antennas can be a promising solution for adaptive MIMO systems in handheld devices

  • Type:

    Article

  • Date:

    27 November 2014

  • Publication Status:

    Published

  • Publisher

    Institution of Engineering and Technology (IET)

  • DOI:

    10.1049/iet-smt.2013.0276

  • Library of Congress:

    TK Electrical engineering. Electronics Nuclear engineering

  • Dewey Decimal Classification:

    621.384 Radio & Radar

  • Funders:

    Edinburgh Napier Funded

Citation

Elfergani, I. T., Hussaini, A. S., Rodriguez, J., Abd-Alhameed, R. A., See, C. H., Jan, N., …McEwan, N. J. (2014). Compact and closely spaced tunable printed F-slot multiple-input–multiple-output antenna system for portable wireless applications with efficient diversity. IET Science, Measurements and Technology, 8(6), 359-369. https://doi.org/10.1049/iet-smt.2013.0276

Authors

Keywords

Tuning; radio transceivers; varactors; capacitors; lumped parameter networks; antennas; MIMO communication,

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