Person: Sehrai, Daniyal Ali
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Sehrai
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Daniyal Ali
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IngenierĆa ElĆ©ctrica, ElectrĆ³nica y de ComunicaciĆ³n
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0000-0002-1664-8544
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813011
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Publication Open Access Pattern diversity based four-element dual-band MIMO patch antenna for 5G mmWave communication networks(Springer, 2024) Sethi, Waleed Tariq; Kiani, Saad Hassan; Munir, Mehre E.; Sehrai, Daniyal Ali; Savci, Huseyin Serif; Awan, Dawar; IngenierĆa ElĆ©ctrica, ElectrĆ³nica y de ComunicaciĆ³n; Ingeniaritza Elektrikoa, Elektronikoa eta Telekomunikazio Ingeniaritza; Universidad PĆŗblica de Navarra / Nafarroako Unibertsitate Publikoa.This study presents a planar dual-band multiple-input multiple-output (MIMO) antenna design for the prospective ffth-generation (5G) frequency bands of 28 and 38 GHz. The antenna element is designed by utilizing a rectangular patch with an ofset microstrip feeding technique. A dual-band response is achieved by placing semi-circular slots on each side of the patch element. To tune the frequency response and improve impedance matching, vertical rectangular slits are etched in the rectangular patch and the ground plane, respectively. The results show that the single antenna element ofers an impedance bandwidth of 2.52 GHz (26.32ā28.84 GHz) and 7.5 GHz (34ā41.5 GHz). In addition, a MIMO confguration based on pattern diversity using four antenna elements is designed and fabricated. The designed MIMO confguration achieves an impedance bandwidth of 3 GHz (27ā30 GHz) and 5.46 GHz (35.54ā41 GHz) at operating bands of 28 and 38 GHz. The peak realized gain for the single element at 28 and 38 GHz is noted to be 7.4 dBi and 7.5 dBi, respectively. Furthermore, the polarization diversity confguration illustrates an isolation of>15 dB and>25 dB for the 28 and 38 GHz frequency bands, respectively. Moreover, the MIMO confguration attains appropriate values for the envelope correlation coefcient (ECC) and diversity gain (DG), Total Active Refection Co-efcient (TARC), Channel Capacity Loss (CCL) and Mean Efective Gain (MEG) for the operating frequency bands. The proposed MIMO system based on results seems to be potential choice for mmwave Ka Band Applications.Publication Open Access Metasurface-based wideband MIMO antenna for 5G millimeter-wave systems(Institute of Electrical and Electronics Engineers Inc., 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; IngenierĆa ElĆ©ctrica, ElectrĆ³nica y de ComunicaciĆ³nThis 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 2Ć 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 24Ć 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 2Ć 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.