Telecommunication

Permanent URI for this collectionhttps://dspace.univ-boumerdes.dz/handle/123456789/3080

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Subject: search.filters.subject.Microstrip antenna

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    Design of 4 elements linear micostip antenna aray with reduced mutual coupling and a feeding network
    (2020) Oukil, Amira; Touahri, Imane; Azrar, Arab (supervisor)
    In this work, a four (4) elements linear microstrip patch antenna with a reduced mutual coupling degree to operate at the 2.45 GHz resonance frequency has been presented. Initially a single rectangular patch has been simulated using the CST MICROWAVE STUDIO printed on a FR4 dielectric material to resonate at 2.45 GHz with a reflection coefficient of -55 dB. Then, the work is extended to a patch with a parasitic element coupled in the radiating edge of the pilot. The reduction of the mutual coupling is carried out by first spacing the patches; but the structure occupies more space. After that, curvatures and slots method is applied to reduce the occupied space. It is noted that the mutual coupling is amply reduced. To quantify the mutual coupling reduction, the curvatures and slots method is further applied 4 elements linear antenna array. For purpose of comparison, the normal 4 elements linear antenna array is studied. The obtained results show that the mutual coupling has acceptable levels that is sufficient to maintain the array characteristics insensible to this effect.
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    Study of plus slotted microstrip antenna for wireless applications
    (2016) Bencharef, Fatma Zohra; Haouchine, Leila; Azrar, Arab (Supervisor)
    This project deals with the design and simulation of a New Microstrip Patch Antenna using IE3D software. The designed antenna was given a name of "Plus Antenna for Wireless Applications". A rectangular antenna with an operating frequency of 2.4 GHz has been studied at the beginning. Later, the rectangular shape is modified to Plus Shaped Antenna and its study has shown two frequencies. The analysis is then extended to Plus Shaped Antenna loaded by two slots. The obtained results show that the antenna can operate at to 1.72 GHz that can be used in third generation 3G application and 2.98GHz useful in WiMax applications. In addition, the reduction in the operating frequency from 2.4 GHz to 1.72 GHz has allowed size reduction of the structure of about 52%.
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    Investigation of multiband microstrip bandstop filters with and without SMD capacitors
    (2018) Boukhalfa, Ammar; Mekati, Bilal; Challal, Mouloud (Supervisor)
    This work presents the design of multiband bandstop filters (BSFs) based on defected ground structure (DGS) technique. The filters are loaded by surface-mount device (SMD) capacitors for dual and triple stopbands operated at 3.69/7.63 GHz and 3.2/5.56/7.28 GHz, respectively. An additional BSF structure without SMD capacitors operated at 3.77/7.16 GHz is as well designed and fabricated. Due to their satisfactory stopband performances, the proposed filters can be useful for various communication systems with dual and triple bands rejection for WiMAX/C bands.