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

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Publication date
2014-11-27Author
Elfergani, Issa T.Hussaini, Abubakar S.
Rodriguez, Jonathan
Abd-Alhameed, Raed

See, Chan H.
Jan, Naeem A.
Zhu, Shaozhen (Sharon)
McEwan, Neil J.
Rights
© 2014 The Institution of Engineering and Technology. This paper is a preprint of a paper accepted by IET Science, Measurement and Technology and is subject to Institution of Engineering and Technology Copyright (http://scitation.aip.org/journals/doc/IEEDRL-home/info/support/copyinf.jsp). The copy of record is available at IET Digital Library.Peer-Reviewed
YesAccepted for publication
2014-08-18
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Show full item recordAbstract
In this work, miniaturized tunable two-antenna MIMO systems composed of printed F-slot shaped is developed to operate in the GPS, PCS, DCS and UMTS 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 2.07GHz 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 miniaturization 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 an un-correlated system with efficient diversity in which the mutual coupling across the full bandwidth was better than -13dB. Owing to the compact size and ease of manufacture, the proposed antennas can be a promising solution for adaptive MIMO systems in handheld devices.Version
Accepted ManuscriptCitation
Elfergani ITE, Hussaini AS, Rodriguez J et al (2014) Compact and closely spaced tunable printed F-slot multiple-input–multiple-output antenna system for portable wireless applications with efficient diversity. IET Science, Measurement and Technology. 8(6): 359-369.Link to Version of Record
https://doi.org/10.1049/iet-smt.2013.0276Type
Articleae974a485f413a2113503eed53cd6c53
https://doi.org/10.1049/iet-smt.2013.0276