Now showing items 1-13 of 13

  • Broadband double-matching via lossless unsymmetrical lattice networks 

    Authors:Şengül, Metin Y.
    Publisher and Date:(Istanbul University, 2012)
    In this paper a broadband double-matching network design algorithm has been presented. In the network an unsymmetrical lattice network has been used. The branch impedances of the lattice network are composed of singly terminated lossless LC networks. After giving the procedure its usage has been illustrated via an example.

  • Broadband double-matching via lossless unsymmetrical lattice networks 

    Authors:Şengül, Metin
    Publisher and Date:(AVES YAYINCILIK, 2012)
    In this paper, a broadband double-matching network design algorithm has been presented. In the network, an unsymmetrical lattice network has been used. The branch impedances of the lattice network are composed of singly terminated lossless LC networks. After giving the procedure, its usage has been illustrated via an example.

  • Broadband impedance matching via lossless unsymmetrical lattice networks 

    Authors:Şengül, Metin Y.
    Publisher and Date:(Elsevier GMBH Urban & Fischer Verlag, 2012)
    In this paper a broadband impedance matching network (equalizer) design algorithm has been proposed. In the equalizer a lossless unsymmetrical lattice network has been utilized. The branch impedances of the lattice network are considered as singly terminated lossless LC networks since it is not desired to dissipate power in the equalizer. After giving the algorithm its usage has been illustrated via an example. (C) 2011 Elsevier GmbH. All rights reserved.

  • Broadband matching via reflection function optimization 

    Authors:Şengül, Metin Y.
    Publisher and Date:(Wiley, 2017)
    In this paper a practical approach is presented for designing broadband matching networks via reflection function optimization. In the proposed algorithm the input or output reflection function of the matching network is expressed in terms of three real polynomials describing the matching network load and generator reflection coefficients. Next one of the polynomials is optimized to get minimum reflection function values in the passband. Then matching network topology and element values are obtained ...

  • Broadband Matching via Unequal Length Cascaded Transmission Lines 

    Authors:Şengül, Metin Y.
    Publisher and Date:(World Scientific Publ Co Pte Ltd, 2017)
    In this paper a new approach based on the real frequency technique (RFT) has been proposed to solve broadband matching problems using cascaded unequal length transmission lines. At the end of the design process optimum characteristic impedance and delay values of transmission lines are obtained. Two examples are given to illustrate the utilization of the proposed approach.

  • Design of Practical Broadband Matching Networks With Mixed Lumped and Distributed Elements 

    Computer-aided design (CAD) tools are always preferred for designing broadband matching networks. However these tools give excellent results when the suitable matching network topology and initial element values are provided. Therefore in this brief a new initialization algorithm is proposed to get suitable network topology and element values for CAD tools. Then the power transfer capability of the matching network can be improved by using any CAD tool. It is clear from the example studied that ...

  • Explicit solutions of two-variable scattering equations and broadband matching network design 

    Authors:Eker, Göker
    Publisher and Date:(Kadir Has University, 2019)
    Mixed lumped and distributed element network design has been a significant issue for microwave engineers (Aksen, 1994). The interconnections of lumped elements can be assumed to be transmission lines and used as circuit components. Also the parasitic effects and discontinuities can be embedded in the design process by utilizing these kinds of structures. Since these networks have two different kinds of elements, their network functions can be defined by using two variables; p = σ + jw for ...

  • Explicit synthesis formulae for cascaded lossless commensurate lines 

    Authors:Şengül, Metin Y.
    Publisher and Date:(Fachverlag Schiele Schon, 2008)
    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.

  • High-pass/low-pass section design for 0 degrees-360 degrees lumped-element phase shifters via the real frequency technique 

    In this paper an algorithm based on the real frequency technique (RFT) is proposed to design high-pass and low-pass sections of a 0 degrees-360 degrees wide range lumped-element phase shifter. The switching process however is not considered in this work. In the algorithm it is enough to define the section type (high-pass or low-pass) and the number of elements in the sections there is no need to select the exact circuit topologies for the high-pass and low-pass sections. This is a natural consequence ...

  • High-pass/low-pass section design for 0◦ 360◦ lumped-element phase shifters via the real frequency technique 

    Authors:Şengül, Metin
    Publisher and Date:(Tübitak, 2017)
    In this paper, an algorithm based on the real frequency technique (RFT) is proposed to design high-pass and low-pass sections of a 0 ◦ –360 ◦ wide range lumped-element phase shifter. The switching process, however, is not considered in this work. In the algorithm, it is enough to define the section type (high-pass or low-pass) and the number of elements in the sections; there is no need to select the exact circuit topologies for the high-pass and low-pass sections. This is a natural consequence ...

  • Real frequency design of Pi and T matching networks with complex terminations 

    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 ...

  • Reflection Modeling Based Broadband Matching Network Design 

    Authors:Şengül, Metin Y.
    Publisher and Date:(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 matching network is obtained to get the desired flat transducer power gain in the passband. Next the output reflection data are calculated using the obtained impedance data then they are modeled as a bounded real function. Then this function is synthesized and the desired lossless ...

  • Synthesis of resistively terminated LC ladder networks 

    Authors:Şengül, Metin Y.
    Publisher and Date:(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 element type that will be extracted is decided. After calculating the element value its transfer scattering matrix is obtained. Then transfer scattering matrix of the remaining network is calculated and the same procedure is applied until the termination resistance is reached. After ...