volume | PIER Journals

Abstract

Highly-miniaturized MIMO antennas are very much desired for 5G-and-beyond hand-held devices as well as miniaturized stationary devices for WSN and IoT applications. In this paper, two compact two-port printed MIMO arrays, measuring 28 × 14 × 0.8 mm³ each, with and without isolation enhancement, are proposed. These arrays have nearly omni-directional radiation patterns over an extended operational bandwidth. The proposed designs feature an extended set of control parameters by which the desired performance could be achieved without compromising space and weight requirements or accuracy. They were fine tuned to provide an operational bandwidth about 4 GHz with relatively low starting frequencies of 2.7 and 3.3 GHz, respectively, allowing simultaneous WiFi, WiMax, 5G operation with a moderate gain and very high efficiency. Prototypes are manufactured and examined for impedance bandwidth, isolation, diversity, and radiation properties showing very good agreement with simulation results.

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Dr. Lubab A. Salman

Dr. Kareem Madhloom Gatea