Şengül, Metin

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https://hdl.handle.net/20.500.12469/6968
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Şengül, Metin
M.,Şengül
M. Şengül
Metin, Şengül
Sengul, Metin
M.,Sengul
M. Sengul
Metin, Sengul
Şengül, Metin Y.
Şengül,M.
Job Title
Prof. Dr.
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[email protected]
Main Affiliation
Electrical-Electronics Engineering
Status
Former Staff
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Turkish CoHE Profile ID
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WoS Researcher ID

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Scholarly Output

76

Articles

51

Views / Downloads

454/11940

Supervised MSc Theses

4

Supervised PhD Theses

1

WoS Citation Count

231

Scopus Citation Count

283

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WoS Citations per Publication

3.04

Scopus Citations per Publication

3.72

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44

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JournalCount
IEEE Transactions on Circuits and Systems II: Express Briefs8
AEU - International Journal of Electronics and Communications7
Journal of Circuits, Systems and Computers4
Frequenz4
Istanbul University-Journal of Electrical and Electronics Engineering4
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Now showing 1 - 10 of 76
  • Thumbnail Image
    Article
    Citation - WoS: 4
    Citation - Scopus: 4
    Reflectance-Based Foster Impedance Data Modeling
    (Fachverlag Schiele Schon, 2007) Şengül, Metin Y.
    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 on the interpolation of the given data as a realizable bounded-real (BR) reflection function. The desired circuit model is obtained by synthesizing this function. An algorithm to generate the circuit model is presented and an example is included which illustrates the utilization of the proposed modeling method.
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    Conference Object
    Citation - Scopus: 5
    A Broadband Microwave Amplifier Design by Means of Immittance Based Data Modelling Tool
    (IEEE, 2002) Kilinç, Ali; Pinarbaşi, Haci; Şengül, Metin Y.; Yarman, Sıddık Binboğa
    In this paper a practical broadband microwave amplifier design algorithm is introduced utilizing the immittance data-modelling tool. In the course of design first the optimum input and output terminations for the active device are produced employing the real frequency technique. Then these terminations are modelled utilizing the new immittance-modelling tool to synthesize the front-end and back-end matching networks. An example is included to exhibit the implementation of the proposed design algorithm to construct a single stage BJT amplifier over a wide frequency band. It is expected that the proposed design algorithm will find applications to realize wideband microwave amplifiers put on MMIC for mobile communication.
  • Thumbnail Image
    Conference Object
    Design of Mixed-Element Networks Via Modeling
    (IEEE, 2008) Şengül, Metin Y.; Yarman, Sıddık Binboğa
    A new method is introduced to design mixed lumped and distributed element network
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    Article
    Citation - WoS: 6
    Citation - Scopus: 8
    Design of Broadband Single Matching Networks
    (Elsevier GMBH Urban & Fischer Verlag, 2009) Şengül, Metin Y.
    In general commercially available software tools are preferred to design broadband matching networks for wireless communication systems. But they need a properly selected matching network topology with good initial element values. Therefore in this paper a new real frequency technique is presented to generate broadband single matching networks with suitable initial element values. In the proposed method load impedance is written in terms of ABCD-parameters of the desired matching network and the source resistor. Then free parameters are optimized which in turn yields the desired matching network with initial element values. It is not needed to select a circuit topology for the matching network which is the natural consequence of the matching processes. Also there is no need to select the desired transducer power gain level , the proposed technique naturally provides a gain curve fluctuating around the final available level. Eventually the initial design is improved by optimizing the performance of the matched system employing the commercially available computer-aided design (CAD) packages. An algorithm and two examples are given to illustrate the utilization of the proposed technique. (C) 2007 Elsevier GmbH. All rights reserved.
  • Thumbnail Image
    Article
    Citation - WoS: 3
    Citation - Scopus: 3
    Explicit Synthesis Formulae for Cascaded Lossless Commensurate Lines
    (Fachverlag Schiele Schon, 2008) Şengül, Metin Y.
    In literature synthesis of cascaded lossless commensurate lines have been realized via some iterative methods. So to be able to obtain the value of an element which is not the first one the designer has to obtain all the values of the elements connected before the desired one. But in this paper explicit synthesis formulae of the networks containing cascaded lossless commensurate lines up to three have been derived analytically and all the element values can be calculated independently.
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    Article
    Citation - WoS: 11
    Design of Distributed-Element Rf Filters Via Reflectance Data Modeling
    (Elsevier GMBH Urban & Fischer Verlag, 2008) Şengül, Metin Y.; Yarman, Sıddık Binboğa; Volmer, Christian; Hein, Matthias A.
    A reflectance-based modeling method is presented to obtain the distributed-element counterpart of a lumped-element network which is described by measured or computed reflectance data at a set of frequencies. Numerical generation of the scattering parameters forms the basis of this modeling tool. It is not necessary to select a circuit topology for the distributed-element model which is the natural consequence of the modeling process. Our approach supplements the known interpolation methods by a simple technique that does not involve complicated cascaded circuit topologies and whose numerical convergence is proven. To illustrate the utilization of the proposed method a lumped-element low-pass Chebyshev filter is transformed to its distributed-element counterpart. The filter designed for a frequency band around 1 GHz was fabricated and experimentally characterized. We find excellent agreement between measured and simulated transducer power gain over the entire frequency band. (c) 2007 Elsevier GmbH. All rights reserved.
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    Conference Object
    Citation - WoS: 2
    Citation - Scopus: 3
    Real Frequency Design of Pi and T Matching Networks With Complex Terminations
    (Institute of Electrical and Electronics Engineers Inc., 2018) Şengül, Metin Y.; Yeşilyurt, Gökmen
    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 resistor and a reactive element connected in series. To be able to design a Pi network this series impedance models must be transformed to parallel models. But for T network designs the assumed series models can be utilized there is no need a transformation process. Then Pi or T matching networks can be designed via Q based method which is well defined in the literature. © 2017 EMO (Turkish Chamber of Electrical Enginners).
  • Thumbnail Image
    Conference Object
    Citation - WoS: 3
    Citation - Scopus: 4
    Transitional Butterworth-Chebyshev Filters
    (IEEE, 2019) Şengül, Metin Y.
    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 this work different 6 th order transitional filters are designed and their responses are compared with each other. © 2018 IEEE.
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    Conference Object
    Alternative Transducer Power Gain Expression in Broadband Matching Network Designs
    (IEEE, 2016) Şengül, Metin Y.
    In this paper a reflection coefficient based transducer power gain expression has been derived which is an alternative to the impedance based expression exists in the literature. A broadband double matching problem is solved by using the derived gain expression and the obtained performance has been compared with the performance obtained via the existing expression.
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    Article
    Citation - WoS: 12
    Citation - Scopus: 10
    Bound-Free Electron-Positron Pair Production in Relativistic Heavy-Ion Collisions
    (Amer Physical Soc., 2009) Şengül, Metin Y.; Güçlü, Mehmet C.; Fritzsche, S.
    The bound-free electron-positron pair production is considered for relativistic heavy ion collisions. In particular cross sections are calculated for the pair production with the simultaneous capture of the electron into the 1s ground state of one of the ions and for energies that are relevant for the relativistic heavy ion collider and the large hadron colliders. In the framework of perturbation theory we applied Monte Carlo integration techniques to compute the lowest-order Feynman diagrams amplitudes by using Darwin wave functions for the bound states of the electrons and Sommerfeld-Maue wave functions for the continuum states of the positrons. Calculations were performed especially for the collision of Au+Au at 100 GeV/nucleon and Pb+Pb at 3400 GeV/nucleon.