Telecommunication
Permanent URI for this collectionhttps://dspace.univ-boumerdes.dz/handle/123456789/3080
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Item A Compact Quad Bands Patch Antenna And MIMO Antenna System For Wireless Communications(Université M’Hamed bougara : Institute de Ginie électric et électronic, 2023) Dibes, Lokmane; Addar, Cherif; Mouhouche, F. (supervisor)Furthermore, a 2 × 2 MIMO antenna is designed by utilizing the polarization diversity technique. The two spiral elements are placed orthogonally and an inverted L-shaped are placed between them to improve the isolation performance. Moreover, the proposed MIMO antenna operates (1.39), (2.5), (3.52) and 4.02 GHZ for WiMAX and C band applications. The isolation of the proposed antenna is higher than 15?dB, and the antenna maintains relatively stable radiation characteristics and gain, as well as a lower envelope correlation coefficient(ECC?less than 0.2).Item A Compact Quad Bands Patch Antenna And MIMO Antenna System For Wireless Communications(Université M’Hamed bougara : Institute de Ginie électric et électronic, 2023) Dibes, Lokmane; Addar, Cherif; Mouhouche, F. (supervisor)This work presents a compact quad band MIMO antenna for wireless communication systems that is developed and investigated. The proposed MIMO antenna structure is composed of two adjacent identical antenna elements which are fed through microstrip lines. The single element of the MIMO system is the spiral monopole antenna. The quad bands are attained by introducing circular ring slots in a circular patch antenna to get a new form of spiral antenna. The proposed single antenna has a dimensions of 14×18 mm 2 . The results show that the single antenna element operates at (1.39), (2.5), (3.63) and 4.15GHz for WiMAX and C band. It is also observed from the results that the antenna offers good radiation characteristics for the frequency band of interest. Furthermore, a 2 × 2 MIMO antenna is designed by utilizing the polarization diversity technique. The two spiral elements are placed orthogonally and an inverted L-shaped are placed between them to improve the isolation performance. Moreover, the proposed MIMO antenna operates (1.39), (2.5), (3.52) and 4.02 GHZ for WiMAX and C band applications. The isolation of the proposed antenna is higher than 15?dB, and the antenna maintains relatively stable radiation characteristics and gain, as well as a lower envelope correlation coefficient(ECC?less than 0.2).Item Miniaturized Microstrip Antenna Using DGS and DMS-CSRR for Multi-Band Aplications(2021) Chibane, Kahina; Kesentini, Safa; Mouhouche, F. (supervisor)This project embodies the design and analysis of a miniaturized patch antenna using fractal defected ground (DGS) and defected Microstrip structure (DMS-SRR) for GPS/GSM, RADAR/SATELLITE, WiMAX and C band applications A modified Minkowiski fractal slot is integrated on the ground plane of lamda/4 fed planar antenna for size reduction .Initially a basic hexagonal patch antenna operates at 6.8GHz is designed. To achieve miniaturization of 73.52%, 55.88%, 39.41 and 19.11% the antenna is integrated with fractal defected ground plane and defected Microstrip structure (DMS-SRR), which makes the antenna to resonate at 1.86GHz, 3.02GHz, 4.12GHz and 5.5GHz frequency bands. The related results show the accuracy of the theoretical studies and good agreement between simulated and measured results, which verify that the antenna has adequate advantages, with a simple structure, compact size, multiband, and it is a suitable candidate for wireless communication applications. Keywords: Miniaturization, fractal DGS, multi-band antenna, DMS-SRR, wireless applications, GPS/GSM, WiMAX, RADAR.