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    Estimation of Complex Permittivity for Solids and Liquids at sub-THz Frequency Range
    (Institute of Electrical and Electronics Engineers Inc., 2018) Ozturk, T.
    In this paper, two different extraction techniques are presented to estimate the complex permittivity of materials with high level accuracy. The performances of presented models are discussed to illustrate their potential for obtaining the dielectric properties and composing a database which will is used to identify the unknown materials easily. Furthermore, the composed data base can be used to classify the liquids as safe or unsafe. Moreover, the relationship of between S-parameters and permittivity are showed using estimating methods. The proposed model gives better results as well as analytical and numerical extraction techniques. © 2018 IEEE.
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    Experimental studies based on classification of explosive and non-explosive liquids
    (Institute of Electrical and Electronics Engineers Inc., 2017) Ozturk, T.; Sayinti, A.; Unal, I.
    Nowadays, since the explosive liquids can easily be obtained by mixing simple substances, the electromagnetic methods developed for safety purposes have gained acceleration. In this study; liquids which may be explosive with chemical explosion, combustion and combination, as well as, non-explosive liquids which may be found inside baggages in airports are used to measure electromagnetic responses ranging from 1-50 GHz and complex dielectric permeability coefficients are calculated with commercial software. Explosive and non-explosive liquids are classified a with the help of three different algorithms such as PLS, PCA and K-Means. © 2017 IEEE.
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    An induction motor design for urban use electric vehicle
    (Institute of Electrical and Electronics Engineers Inc., 2016) Guneser, M.T.; Dalcali, A.; Ozturk, T.; Ocak, C.; Cernat, M.
    Because of fossil fuel shortage and its damages on environment, electric vehicles (EV) are going to be more popular in science and car industry as well. So, EV's take an opportunity to spread over the traffic finally. But battery, which is the main energy supplier of the motor, has disadvantages as big volume and weight. Scientists try to enhance energy densities, ranges and quicken charging. All of research results force us to drive EV in a loop, close to charging stations for near future. So EV's should be designed by considering urban road and speed conditions as well. In this survey, we designed a new two pole 7,5 kW induction motor for a certain electric vehicle, which was designed to use urban drive. We considered urban traffic rules and conditions, while designing the motor. We simulated and verified analytical and finite element analysis of the designed induction motor. We also modelled and simulated the EV with the induction motor on MATLAB to observe control performance of field oriented control (FOC) on several urban use scenarios. According to our results, EV with designed motor can be realized and controlled. © 2016 IEEE.
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    Permittivity measurements for dielectric lens and dielectric rod antenna designs
    (Institute of Electrical and Electronics Engineers Inc., 2016) Panin, S.B.; Unal, I.; Sayinti, A.; Ozturk, T.; Tekbas, M.
    For dielectric materials being often utilized in quasi-optical components, the permittivity was evaluated by free-space method in W-band. The obtained permittivity value was applied to designing of low aberration large aperture aspheric dielectric lens and dielectric waveguide rod antenna. These components composed the antenna system for the passive radiometric imaging in 90-100 GHz frequency range. This antenna system was experimentally demonstrated to successfully detect and recognize the metallic weapon hidden under outer clothing. © 2016 IEEE.
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    A Review of Millimeter Wave Communication for 5G
    (Institute of Electrical and Electronics Engineers Inc., 2018) Seker, C.; Guneser, M.T.; Ozturk, T.
    The millimeter wave (mmWave) bands give new facilities with tremendous amount of spectrum to fifth generation (5G) mobile communication network to supply mobile data demand, which is expanding out of control. Essential differences are considered between conventional systems and mmWave communications, regarding directivity, sensitivity to blockage and high propagation loss. mmWave brings various challenges in communication on some issues such as anti-blocking, interference management, spatial reuse, dynamic control and system design for fully utilizing. In this study, we surveyed on solutions and standards for these challenges and we proposed design principles in architecture and protocols for mmWave communications. And previous studies in the literature on whether the millimeter wave band can be tested in small cell access in 5G, cellular access in 5G and wireless backhaul in 5G or not have been investigated. Also, we described prospective using areas of mmWave in 5G. © 2018 IEEE.