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Publications (7)0 Total impact

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    ABSTRACT: The evolution of the graphics processing units (GPU) driven by the computer games business brought a graphics hardware as a high performance, programmable and non-expensive chips. Nowadays, the graphic card has a truly programmable architecture which allows to process data with high parallelism and high memory access rate. That is the key motivation fact for using them for parallel processing. The performance of graphical processing units (GPU) has been significantly improved in recent years. Compared with the CPU, the GPU is better suited for parallel processing and vector processing and has evolved to perform various types of computation, in addition to graphics processing, including numerical computations. In general, there are two factors that in some combination make GPU attractive target architecture for accelerating general purpose computations. First, is the raw throughput speed of GPU compared to CPU. Second, the GPU acts as a coprocessor, therefore it can free up the CPU to perform other tasks.The graphics processing unit (GPU) has been used for the solution of electromagnetic scattering problem using the FDFD method. The radar cross section for different structures has been calculated using the FDFD code implemented using Matlab for the CPU and implemented using the BrookGPU platform for the GPU. The solution obtained by using the GPU code showed more than three times speed over the CPU code.
    Radio Science Conference, 2009. NRSC 2009. National; 01/2009
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    ABSTRACT: Abstract—A proposed sensor for landmines detection consists of two parallel microstrip antennas placed on the same ground plane and with defected ground structure between them has been investigated. The microstrip patch array with defected ground structure has the advantage of a low mutual coupling compared,with the classic one. The Finite-Difference Time-Domain (FDTD) is used to simulate the sensor for landmines detection.
    Progress in Electromagnetics Research B. 01/2008; 4:27-39.
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    ABSTRACT: A modified design for a DRA that operate in the Universal Mobile Telecommunication System (UMTS) band is introduced. The antenna is fixed over a conducting box to simulate the handset in the cellular communication systems. Using the FDTD method, the radiation parameters of the antenna over the handset model are investigated. The effect of the human proximities including, the head, the hand, and the user's glasses on the antenna performance are studied. The SAR distribution inside the human head is calculated.
    Radio Science Conference, 2007. NRSC 2007. National; 04/2007
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    ABSTRACT: Finite-difference frequency domain (FDFD) is formulated to calculate the scattered field from superquadric dielectric cylinder. A hybrid technique from FDFD and particle swarm optimization technique (PSO) is used to reconstruct both the shape and the relative permittivity of a homogenous dielectric cylinder. The dielectric constants of materials in the solid, liquid, or in the paste forms are considered.
    Radio Science Conference, 2007. NRSC 2007. National; 04/2007
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    ABSTRACT: In this paper, the radiation pattern and input impedance of the strip-fed rectangular DRA are computed numerically using the FDTD. Different ground plane shapes are considered. The flat PEC ground plane is replaced with corrugated ground planes, and M-EBG ground plane. The analysis illustrates that the corrugated ground planes and the M-EBG ground planes contribute to reduction in the backward radiation
    Antennas and Propagation Society International Symposium 2006, IEEE; 08/2006
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    ABSTRACT: Finite-difference time-domain (FDTD) method is used to illustrate the characteristics of strip-fed rectangular dielectric resonator antenna (DRA) over a ground plane with different shapes. The rectangular DRA is investigated on infinite ground plane, finite perfect electric conductor (PEC) ground plane, corrugated ground plane and electromagnetic band gap (EBG) ground plane. The input impedance and the radiation patterns in different planes are calculated and compared with a finite flat PEC ground plane.
    Radio Science Conference, 2006. NRSC 2006. Proceedings of the Twenty Third National; 04/2006
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    ABSTRACT: This paper presents a graphics processing based im-plementation of the Finite-Difference Frequency-Domain (FDFD) method, which uses a central finite differencing scheme for solving Maxwell's equations for electromagnetics. The radar cross section for different structures in 2D and 3D has been calculated using the FDFD method. The FDFD code has been implemented for the CPU calcu-lations and the same code is implemented for the GPU calculations using the Brook+ developed by AMD. The solution obtained by using the GPU based-code showed more than 40 times speed over the CPU code.