Browsing by Author "Şengül, Metin Y."
Now showing items 41-60 of 60
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On the inverse point-source problem of the poisson equation
Yılmaz, Melek; Şengül, Metin Y.; Geçkinli, Melih (Istanbul University, 2005)In this work a basic inverse heat conduction problem of a simple 2-D model with steady state heat source is taken into view. The physical problem is for a square region with uniform thermophysical properties and a point ... -
Phase Shifting Properties of High-Pass and Low-Pass Mixed-Element Two-Ports
Şengül, Metin Y.; Çakmak, Gökhan; Özdemir, Rabia (Institute of Electrical and Electronics Engineers Inc., 2021-04)n many applications, circuits containing lumped-elements are preferred because of their small sizes. But it is not possible to avoid losses caused by the connections between lumped-elements at high frequencies. However, ... -
Power transfer networks at RF frequencies "New design procedures with implementation roadmap"
Şengül, Metin Y.; Trabert, Johannes; Blau, Kurt; Yarman, B. Sıddık; Hein, Matthias (IEEE, 2006)The purpose of this work is to provide the necessary background to design wide-band power transfer two-ports, or so-called broadband matching networks, at radio frequencies for wireless communication systems. The importance ... -
Production of electron-positron pairs by nuclear dissociation in peripheral heavy ion collisions
Güçlü, Mehmet Cem; Şengül, Metin Y. (Elsevier, 2007)The STAR Collaboration at the Relativistic Heavy Ion Collider present data on electron-positron pair production accompanied by nuclear breakup at small impact parameters where the simultaneous excitation of the two ions ... -
Real frequency design of Pi and T matching networks with complex terminations
Şengül, Metin Y.; Yeşilyurt, Gökmen (Institute of Electrical and Electronics Engineers Inc., 2018)In this paper real frequency design of Pi and T matching networks with complex terminations is studied. Generally the generator and load termination impedances are given as measurement values. So they can be regarded as a ... -
Realization of ideal filter characteristics via genetic algorithm
Şengül, Metin Y.; Özmen, Atilla (2011)In this paper realization of ideal filter characteristics via genetic algorithm has been studied. The filter is defined as a lossless two-port terminated normalized source and load resistances and the coefficients of its ... -
Reflectance data model with mixed lumped and distributed elements for wireless communication systems
In this paper, a new method is presented to model the given reflectance data obtained from a "passive one-port physical device", as a lossless two port consists of lumped and distributed elements. Basis of the new method ... -
Reflectance-based Foster impedance data modeling
Şengül, Metin Y. (Fachverlag Schiele Schon, 2007)A reflectance-based method is presented to model a set of given Foster impedance data as a lossless singly terminated two-port consisting of lumped-elements in short or open termination. The basis of the new method rests ... -
Reflection Modeling Based Broadband Matching Network Design
Şengül, Metin Y. (Walter De Gruyter, 2017)In this paper a new broadband matching network design approach based on reflection modeling is proposed which has two parts: impedance data generation and modeling. In the approach firstly the output impedance data of the ... -
Relativistic antihydrogen production by pair production with positron capture
Şengül, Metin Y.; Guclu, Mehmet C. (Elsevier Science Bv, 2012)Antihydrogen atoms may rarely be produced by the collision of antiprotons with ions. At relativistic velocities the antiproton may pass around the Coulomb field of the nucleus and the electron-positron pairs can be produced ... -
Shifted-modified Chebyshev filters
Şengül, Metin Y. (TUBITAK Scientific & Technical Research Council Turkey, 2013)This paper introduces a new type of filter approximation method that utilizes shifted-modified Chebyshev filters. Construction of the new filters involves the use of shifted-modified Chebyshev polynomials that are formed ... -
A single matching network design for a double band PIFA antenna via simplified real frequency technique
In this paper, matched performance of a double band PIFA antenna is reported. The transducer power gain of the antenna is optimized over the commercialized wireless communication bands of 824-960 MHz and 1710-1990 MHz using ... -
A single matching network design for a dual band PIFA antenna via simplified real frequency technique
Lindberg, Peter; Şengül, Metin Y.; Çimen, Ebru Gürsu; Yarman, Binboğa Sıddık; Rydberg, Anders; Aksen, Ahmet (2006)In this paper, the matched performance of a dual band PIFA antenna is reported. The return loss of the antenna has been optimized over the popular commercial wireless communication bands of 824-960 MHz and 1710-1990 MHz ... -
Synthesis of cascaded lossless commensurate lines
Şengül, Metin Y. (IEEE-INST Electrical Electronics Engineers Inc, 2008)A scattering transfer matrix factorization based algorithm for cascaded lossless commensurate line synthesis is presented. The characteristic impedances of the extracted commensurate lines and the reflection factors of the ... -
Synthesis of lossless ladder networks with simple lumped elements connected via commensurate transmission lines
Şengül, Metin Y. (AVES YAYINCILIK, 2010)An algorithm has been proposed, to synthesize low-pass, high-pass, band-pass and band-stop lossless ladder networks with simple lumped elements connected via commensurate transmission lines (Unit elements, UEs). First, ... -
Synthesis of lossless ladder networkswith simple lumped elements connected viacommensurate transmission lines
Şengül, Metin Y. (Istanbul University, 2010)An algorithm has been proposed to synthesize low-pass high-pass band-pass and band-stop lossless ladder networks with simple lumped elements connected via commensurate transmission lines (Unit elements UEs). First the type ... -
Synthesis of resistively terminated high-pass LC ladder networks [Direnç ile sonlandırılmış yüksek geçiren LC merdiven devrelerin sentezi]
Şengül, Metin Y.; Aydoğar, Zafer (2010)In this paper a transfer matrix factorization based synthesis algorithm for resistively terminated high-pass LC ladder networks is presented. In the algorithm component value of the extracted element and the scattering ... -
Synthesis of resistively terminated LC ladder networks
Şengül, Metin Y. (Istanbul University, 2011)In this work element value calculation algorithms have been proposed for low-pass high-pass band-pass and band-stop LC ladder networks. According to the calculated constant from the given transfer scattering matrix the ... -
Transfer matrix factorization based synthesis of resistively terminated LC ladder networks
Şengül, Metin Y.; Aydoğar, Zafer (2009)In this paper a transfer matrix factorization based synthesis algorithm for resistively terminated low-pass LC ladder networks is presented. In the algorithm component value of the extracted element and the reflection ... -
Transitional Butterworth-Chebyshev Filters
Şengül, Metin Y. (IEEE, 2019)Filters which are studied in this paper have properties that lie between those of the Butterworth and Chebyshev filters. So it is appropriate to call this kind of filters as transitional Butterworth-Chebyshev filters. In ...