Electrical - Electronic Engineering / Elektrik - Elektronik Mühendisliği
Permanent URI for this collectionhttps://hdl.handle.net/11147/11
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Conference Object Electromagnetic Scattering From Arbitrary Flat Plates: Analysis of the Problem by Using Method of Moments With Different Sinc Type Basis Functions(Institute of Electrical and Electronics Engineers Inc., 2011) Özbakış, Başak; Oğuzer, Taner; Kuştepeli, AlpIn this paper, three dimensional electromagnetic scattering problem is solved by using pulse-sinc type basis functions in the Method of Moments (MoM) procedure. This method is applied to the scattering problems of a plane wave illuminated flat arbitrary geometries. Pulse-sinc based MoM formulation is developed, the current densities and radar cross section of different geometries are investigated. The radar cross section (RCS) for co-polarized and cross polarized cases of the flat plate geometries are compared with both of the results obtained from the sinc-sinc based formulation and SuperNEC. The results obtained by using pulse-sinc fornulation are in very good agreement with those of the SuperNEC. © 2011 IEEE.Conference Object Citation - Scopus: 1Three-Dimensional Electromagnetic Scattering From Flat Plates by Using Sinc-Type Basis Functions in Method of Moments(Institute of Electrical and Electronics Engineers Inc., 2009) Özbakış, Başak; Oğuzer, Taner; Kuştepeli, AlpSinc functions are used in the basis and testing procedures in the conventional method of moments (MoM) formulation. But unlike conventional MoM, simple pointwise meshing is enough and no integral computation is required due to the mathematical properties of the sinc function. The simulation results of surface current densities and radar cross section for a few wavelength square flat plate are obtained by using our own codes. The results are compared with those of the rooftop basis functions. The CPU-time decreases by half of the time of the conventional method. The error that occurs from the approximated integral of the sinc function in the computation of main matrix elements is very small and decreases while the bandwidth of the sinc function increases.Article Citation - WoS: 12Citation - Scopus: 16The Resonant Behavior of the Fibonacci Fractal Tree Antennas(John Wiley and Sons Inc., 2008) Özbakış, Başak; Kuştepeli, AlpAn investigation of a novel fractal tree antenna with the application to two different geometries is presented. The antenna is designed by using the special Fibonacci number sequence which leads to nonuniform branch length ratios to form the fractal tree. This new approach gives better performance, especially in the miniaturization of the antenna, when compared with the conventional designs. The results obtained from the experiments are also compared with the computed ones and there is a very good agreement between the numerical and measured data.