Browsing by Author "Azrar, Arab (Supervisor)"

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    Contribution to the Design and Analysis of Miniaturized butterfly MIMO Antenna
    (Université M’Hamed bougara : Institute de Ginie électric et électronic, 2023) Bir, Yasmine Rania; Azrar, Arab (Supervisor)
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    Contribution to the design of electromagnetic power harvesting system
    (Université M’Hamed Bougara de Boumerdes : Institut de génie electrique et electronique (IGEE), 2024) Abed, Abdesselem; Barkat, Menouar; Azrar, Arab (Supervisor)
    In this report, a compact Rectenna is designed and fabricated with the aim of harvesting RF energy at the frequency of 2.4 GHz. The system consists of a 40mm x 40mm microstrip patch antenna, a Villard voltage doubler for the rectifier circuit designed with HSMS-2850 Schottkey diode for RF application. The rectifier and antenna are joined with a ?-matching network composed of printed lumped components for impedance matching, consisting of a series interdigital capacitor and shunt strip inductors. It should be mentioned that the use of printed lumped components is not found in any literature related to energy harvesting as of the writing of this report. The system has been designed on an FR-4 substrate with thickness of 1.5 mm, a tangent loss of 0.02 and relative permittivity of 4.4. Using an RF generator connected to the energy harvesting circuit, the circuit generates measurable voltage starting from 7dBm input power. The realized circuit gives a DC output voltage of 5.4mV at 20dBm input power with a PCE of 2.916 × 10 -6 %.
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    Design and analysis of miniaturized microstrip Yagi - Uda Antenna
    (2021) Bendaimi, Amira; Azrar, Arab (Supervisor)
    This report proposes a method for automatic heartbeat classification into four classes recommended by AAMI EC57:1998 standard, i.e., normal beat(N), ventricular ectopic beat (VEB), supraventricular ectopic beat (SVEB) or fusion of normal and VEB beat. The classification is divided into two steps, the first one is the determination of normality/abnormality of the heartbeat, then identify the type of abnormality if it exists. Data was obtained from two databases: the 44 non-pacemaker recordings of MIT-BIH arrythmia database, and the St Petersburg INCART database which consists of 75 recordings. Two data distributions were used during the implementation, the first is splitting MIT-
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    Design and analysis of S-shaped microstrip antenna
    (2018) Mamoune, Soumia; Azrar, Arab (Supervisor)
    This project aimed at studying and designing S-shaped microtrip patch antenna operating at3GHz which is suitable for Radar application. With a view to be familiar with microstrip antennas,this work is started by designing rectangular microstrip patch antenna working at 3GHz.Later,the rectangular shape is modified toS-shaped antenna and it is found that itcould be multiband antenna operating at 1.73GHz(convenientfor GSM application),3GHz(the desired radar frequency) and 4.23 GHz after small adjustments in the antenna dimensions and feed position.The ob- tained results show that the S-shaped antenna can operate at1.73GHz with size reduction of the structure ofabout 68%. Both rectangular and S-shaped microstrip patch antennas are designed using transmission line model and coaxial probe feed ,the simulation is done by IE3D Software. Finally,S-shaped microstrip antenna is fabricated and tested .A good simulation and measurement results are achieved.
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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%.