Sehrai, Daniyal Ali
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Sehrai
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Daniyal Ali
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Ingeniería Eléctrica, Electrónica y de Comunicación
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Publication Open Access Decoupling structure for high-bandwidth multiport monopole antennas in K-band and 5G applications(Wiley, 2024-12-27) Sehrai, Daniyal Ali; Kiani, Saad Hassan; Ali, Tanweer; Abbasi, Muhammad Inam; Kamarudin, Muhammad Ramlee; Algarni, Abeer D.; Elmannai, Hela; Ingeniería Eléctrica, Electrónica y de Comunicación; Ingeniaritza Elektrikoa, Elektronikoa eta Telekomunikazio IngeniaritzaThis paper introduces a multiport monopole antenna featuring high isolation and a broad operating bandwidth, specifically designed for K-band and 5G applications. The proposed antenna configuration comprises four antenna elements assembled to achieve a compact design. A 0.254 mm thick Rogers RT-5880 substrate is used, with an overall size of 24 x 22 mm. Each antenna element is supported by a truncated ground plane, and four symmetrical slots are introduced into the radiating structures. As a result, the proposed multiport antenna covers a frequency band of approximately 18-27 GHz, based on the -10 dB criterion, providing a wide bandwidth of nearly 9 GHz. The separation between the antenna elements is about 4.5 mm. Additionally, a decoupling structure is inserted between the radiating elements to enhance isolation within the desired band, also resulting in a minor improvement in the operating bandwidth. Several performance metrics, including total active reflection coefficient (TARC), diversity gain (DG), envelope correlation coefficient (ECC), and channel capacity loss (CCL), are evaluated and show satisfactory performance within the operating bandwidth. The proposed antenna achieves more than 75% radiation efficiency. The overall performance of the multiport antenna indicates its potential for K-band and 5G applications.Publication Open Access Metasurface-based wideband MIMO antenna for 5G millimeter-wave systems(IEEE, 2021) Sehrai, Daniyal Ali; Asif, Muhammad; Shah, Wahab Ali; Khan, Jalal; Ullah, Ibrar; Ibrar, Muhammad; Jan, Saeedullah; Alibakhshikenari, Mohammad; Falcone Lanas, Francisco; Limiti, Ernesto; Ingeniaritza Elektrikoa, Elektronikoaren eta Telekomunikazio Ingeniaritzaren; Institute of Smart Cities - ISC; Ingeniería Eléctrica, Electrónica y de ComunicaciónThis paper presents a metasurface based multiple-input multiple-output (MIMO) antenna with a wideband operation for millimeter-wave 5G communication systems. The antenna system consists of four elements placed with a 90 degree shift in order to achieve a compact MIMO system while a 2× 2 non-uniform metasurface (total four elements) is placed at the back of the MIMO configuration to improve the radiation characteristics of it. The overall size of the MIMO antenna is 24× 24 mm2 while the operational bandwidth of the proposed antenna system ranges from 23.5-29.4 GHz. The peak gain achieved by the proposed MIMO antenna is almost 7dB which is further improved up to 10.44 dB by employing a 2× 2 metasurface. The total efficiency is also observed more than 80% across the operating band. Apart from this, the MIMO performance metrics such as envelope correlation coefficient (ECC), diversity gain (DG), and channel capacity loss (CCL) are analyzed which demonstrate good characteristics. All the simulations of the proposed design are carried out in computer simulation technology (CST) software, and measured results reveal good agreement with the simulated one which make it a potential contender for the upcoming 5G communication systems.