An investigation of beam scanning of arrays on cylindrical, conical and spherical surfaces

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Tezin Türü: Yüksek Lisans

Tezin Yürütüldüğü Kurum: Orta Doğu Teknik Üniversitesi, Mühendislik Fakültesi, Elektrik ve Elektronik Mühendisliği Bölümü, Türkiye

Tezin Onay Tarihi: 2015

Öğrenci: YÜCEL TAKAK

Danışman: HATİCE ÖZLEM AYDIN ÇİVİ

Özet:

Recently, wide angle scanning antennas are often required especially in many radar applications. It is known that planar arrays have limited scan range without beam deformation. In this study design and production steps for wide angle scanning antenna arrays conformed on cylindrical, conical and spherical surfaces that operate at X-Band are investigated. Antenna elements used in these conformal arrays are designed using full wave electromagnetic solver tool HFSS. A MATLAB code for obtaining array patterns in principal planes using active element pattern is developed and it is verified by comparing the results with the ones obtained by HFSS for arrays with small number of elements. Fabricated antenna elements are produced and their conformability on desired surfaces is investigated. Non-planar surfaces where antenna located are produced using 3D printer. Designed antennas are conformed on the produced surfaces and their radiation patterns are measured for some scan angles. Obtained radiation patterns are in good agreement with simulation results.