8472

7853

كارشناسي ارشد

مخابرات

اصفهان: دانشگاه صنعتي اصفهان، دانشكده برق و كامپيوتر

1392

سيزده،90ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

مهندسي برق و كامپيوتر

ID7853

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Analysis Design and Simulation a Column Array of SSR Antenna with Cosecant Squared Pattern Mohsen Abdolahi m abdolahi@ec iut ac ir Department of Electrical and Computer Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisor Zaker Hossein Firouzeh zhfirouzeh@cc iut ac ir Abstract In this Thesis an antenna with a cosecant squared pattern to work as a radiating vertical array of SSR antennas is designed A simple microstrip structure is adopted to design as the feed network and 11 elements of half wave dipoles In order to achieve desired pattern amplitude and phase of elements are obtained using a synthesis pattern method Some Special Wilkinson power dividers are used to prepare desired power amplitudes to feed the elements The designed antenna has nearly 10 dB gain and its main beam in the elevation plane is 9 degrees above the ground Its 10 dB Beam width in elevation pattern is 50 deg The return loss in central frequency is 22 dB RT Duroid 5880 r 2 2 and tan 0 0009 with thickness of 31 mil is used as the substrate Keywords Cosecant Squared Pattern Secondary Surveillance Radar SSR Printed Half Wave Dipole Fourier Chebyshev and Taylor Distribution PDF created with pdfFactory trial version www pdffactory com

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غلامرضا عسكري

رضا صفيان، محسن مداح علي