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dc.contributor.authorChouti, Leila
dc.contributor.authorBenghalia, Abdelmadjid
dc.date.accessioned2018-11-07T19:15:10Z
dc.date.available2018-11-07T19:15:10Z
dc.date.issued2018-07-01
dc.identifier.urihttp://hdl.handle.net/123456789/136417
dc.description.abstractThe main purpose of this thesis was to study, modeling and design of printed antennas. Three main parts have formed the body of this thesis. In the first part, we have developed two methods for modeling a rectangular microstrip antenna with a rectangular aperture in the ground plane. The first method is based on the determination of hybrid dyadic Green’s functions in the spectral domain, while in the second method, we have applied the finite difference time domain for the analysis of the microstrip antenna. The two methods have been validated by comparing our numerical results with experimental measurements as well as with results obtained using the HFSS simulation software. The second part has been devoted to the study of performances of two multi-antennas systems. Each system has eight radiating elements having as a basic element a microstrip patch. The main difference between these two systems lies in the excitation technique, where the radiating elements of the second multi-antenna system have been fed through apertures cut into the ground plane. The performances in terms of adaptation and isolation for these two systems have been discussed. Results concerning the radiation patterns and gain have been also presented. In the third part of this thesis, our efforts were directed towards the design of a new tri-band triangular monopole antenna structure. A rectangle-shaped aperture has been etched on the radiating element to generate the second resonant frequency. To obtain the third resonant frequency, a pair of symmetrical L-shaped parasitic elements has been added on both sides of the triangular monopole antenna. A coplanar waveguide feeding mechanism has been used to provide good performances on all bands. The CST simulation software has been used in the optimization of the parameters of the proposed antenna. A prototype of the proposed antenna has been fabricated in the RF laboratory of the INRS in Montreal, Canada. The simulated results in terms of reflection coefficient and radiation pattern have been compared with experimental measurements and a good agreement has been obtained. Measured and simulated results demonstrate that the proposed antenna can achieve three desired operating bands, higher isolation characteristic between adjacent bands. A stable gain and a good omnidirectional radiation in the H-plane have also been achieved. As a result, the performances offered by the proposed antenna are very promising for practical WLAN/WiMAX applications.fr_FR
dc.language.isofrfr_FR
dc.publisherجامعة الإخوة منتوري قسنطينةfr_FR
dc.subjectAntenne microrubanfr_FR
dc.subjectantenne microruban couplée par une ouverturefr_FR
dc.subjectméthode des différences finies (FDTD)fr_FR
dc.subjectsystème MIMOfr_FR
dc.subjectantenne multi bandefr_FR
dc.subjectmicrostrip antennafr_FR
dc.subjectaperture microstrip antennafr_FR
dc.subjectFDTD methodfr_FR
dc.subjectMIMO systemfr_FR
dc.subjectmultiband antennafr_FR
dc.subjectھوائیات میكرو شریطیةfr_FR
dc.subjectھوائیات المیكرو شریطیة المقترنة بفتحةfr_FR
dc.subjectطریقةfr_FR
dc.subjectنظام FDTDfr_FR
dc.subjectھوائي متعدد النطاقات MIMOfr_FR
dc.titleCaractérisation d’une antenne microbande couplée par une ouverture de forme rectangulaire.fr_FR
dc.title.alternativeApplication à la réalisation d’une antenne multibande.fr_FR
dc.typeThesisfr_FR


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