| Autor: |
Alhawari ARH; Electrical Engineering Department, College of Engineering, Najran University, Najran 66462, Saudi Arabia., Saeidi T; Electrical and Electronic Engineering Department, Universiti Teknologi PETRONAS, Bandar Seri Iskandar 32610, Malaysia., Almawgani AHM; Electrical Engineering Department, College of Engineering, Najran University, Najran 66462, Saudi Arabia., Hindi AT; Electrical Engineering Department, College of Engineering, Najran University, Najran 66462, Saudi Arabia., Alghamdi H; Electrical Engineering Department, College of Engineering, Najran University, Najran 66462, Saudi Arabia., Alsuwian T; Electrical Engineering Department, College of Engineering, Najran University, Najran 66462, Saudi Arabia., Awwad SAB; Deanship of Information and Communication Technology, Imam Abdulrahman Bin Faisal University, Dammam 31441, Saudi Arabia., Imran MA; James Watt School of Engineering, University of Glasgow, Glasgow G12 8QQ, UK.; Artificial Intelligence Research Centre (AIRC), Ajman University, Ajman 20550, United Arab Emirates. |
| Abstrakt: |
A low-profile Multiple Input Multiple Output (MIMO) antenna showing dual polarization, low mutual coupling, and acceptable diversity gain is presented by this paper. The antenna introduces the requirements of fifth generation (5G) and the satellite communications. A horizontally (4.8-31 GHz) and vertically polarized (7.6-37 GHz) modified antipodal Vivaldi antennas are simulated, fabricated, and integrated, and then their characteristics are examined. An ultra-wideband (UWB) at working bandwidths of 3.7-3.85 GHz and 5-40 GHz are achieved. Low mutual coupling of less than -22 dB is achieved after loading the antenna with cross-curves, staircase meander line, and integration of the metamaterial elements. The antennas are designed on a denim textile substrate with εr = 1.4 and h = 0.5 mm. A conductive textile called ShieldIt is utilized as conductor with conductivity of 1.8 × 10 4 . After optimizing the proposed UWB-MIMO antenna's characteristics, it is increased to four elements positioned at the four corners of a denim textile substrate to be employed as a UWB-MIMO antenna for handset communications, 5G, Ka and Ku band, and satellite communications (X-band). The proposed eight port UWB-MIMO antenna has a maximum gain of 10.7 dBi, 98% radiation efficiency, less than 0.01 ECC, and acceptable diversity gain. Afterwards, the eight-ports antenna performance is examined on a simulated real voxel hand and chest. Then, it is evaluated and compared on physical hand and chest of body. Evidently, the simulated and measured results show good agreement between them. The proposed UWB-MIMO antenna offers a compact and flexible design, which is suitably wearable for 5G and satellite communications applications. |
