article · International Journal of Communication Systems
A four-port multiple-input multiple-output (MIMO) antenna has been developed for 5G New Radio networks, targeting the n257, n258, and n261 bands. Constructed on a Rogers RT/duroid 5880 substrate measuring 31.891 by 37.5885 by 0.508 millimetres, the design features four arc-shaped patch elements with modified ground planes. Physical prototyping was carried out to validate simulation models. Across a wide bandwidth from 21.8 to 29.1 GHz, the antenna achieves isolation of better than minus 18 dB and reaches a peak gain of 5.76 dBi at 29 GHz. Diversity evaluations show an envelope correlation coefficient below 0.001, diversity gain above 9.995 dB, and an average mean effective gain of minus 3 dB. These characteristics indicate robust performance in a compact form factor.
Expanding 5G wireless networks requires compact hardware that can process high-frequency signals reliably without interference between channels. This design offers high isolation and stable signal diversity across multiple millimetre-wave bands, providing a viable architecture to support dense data traffic in next-generation communications infrastructure.
This antenna design is aimed at manufacturers and network equipment providers working on 5G New Radio infrastructure operating in the n257, n258, and n261 bands. Because the work includes both simulation and experimental validation of a fabricated prototype, it sits at an applied, lab-tested stage of development, though commercial packaging and integration into carrier-grade devices would still be required.
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Summary A novel antenna system that utilizes multiple‐input and multiple‐output (MIMO) technology to suit the requirements of 5G applications is proposed in this article. The antenna has a wide operating bandwidth and high isolation in n257/n258/n261 5G bands. The suggested arc‐shaped MIMO antenna is composed of four similar patch units with modified ground planes arranged in a four‐port configuration and is made on a Rogers RT/duroid 5880 substrate, which measures 31.891 × 37.5885 × 0.508 mm 3 . The prototype of the suggested MIMO antenna is realized to confirm the obtained simulated results and validate the proposed design. The four‐port MIMO antenna features a broad frequency range of 7.3 GHz from 21.8 to 29.1 GHz, a peak gain of 5.76 dBi at 29 GHz, and a good isolation less than −18 dB. The proposed antenna's MIMO performance is evaluated by analyzing several diversity parameters. The findings of the evaluation demonstrate an envelope correlation coefficient (ECC) value of less than 0.001, a diversity gain (DG) value exceeding 9.995 dB, and an average mean effective gain (MEG) of −3 dB within the operational frequency band. The suggested MIMO antenna's compact size and impressive performance make it a suitable choice for intended n257/n258/n261 5G NR networks.
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DOI: 10.1002/dac.5746
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